Abstract

We have designed and demonstrated a chirped ladder-type tunable filter and discussed its potential application for a tunable diode laser. A ladder interferometric filter normally has a periodic passband, which makes it impossible to stabilize laser oscillation frequency. To overcome this drawback, we have designed, fabricated, and characterized a novel chirped tunable ladder filter. We have successfully demonstrated a single-passband response in the fabricated device. Furthermore, a tuning operation of more than 30 nm was achieved by introducing a current injection structure and optimizing electrode lengths at each single-stage ladder interferometer.

© 2005 Optical Society of America

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  1. V. Jayaraman, Z. M. Chuang, L. Coldren, “Theory, design, and performance of extended tuning range semiconductor lasers with sampled gratings,” IEEE J. Quantum Electron. 29, 1824–1834 (1993).
    [Crossref]
  2. H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
    [Crossref]
  3. B. Glance, I. P. Kaminow, R. W. Wilson, “Applications of the integrated waveguide grating router,” J. Lightwave Technol. 12, 957–962 (1994).
    [Crossref]
  4. M. Zirngibl, C. H. Joyner, “12 frequency WDM laser based on a transmissive waveguide grating router,” Electron. Lett. 30, 701–702 (1994).
    [Crossref]
  5. S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of the European Conference on Optical Communication (ECOC), Italy, Th.1.2.3, pp. 884–885 (2003).
  6. S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).
  7. C. R. Doerr, M. Zirngibl, C. H. Joyner, “Chirping of the waveguide grating router for free spectral range mode selection in the multifrequency laser,” IEEE Photon. Technol. Lett. 8, 500–502 (1996).
    [Crossref]
  8. C. R. Doerr, C. H. Joyner, M. Zirngibl, L. W. Stulz, “Chirped waveguide grating router multifrequency laser with absolute wavelength control,” IEEE Photon. Technol. Lett. 8, 1606–1608 (1996).
    [Crossref]
  9. S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
    [Crossref]
  10. S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
    [Crossref]
  11. H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
    [Crossref]
  12. B. R. Bennett, R. A. Soref, J. A. Del Alamo, “Carrier induced change in refractive index of InP, GaAs, and GaInAsP,” IEEE J. Quantum Electron. 26, 113–122 (1990).
    [Crossref]
  13. J. P. Weber, “Optimization of the carrier-induced effective index in InGaAsP waveguides-Application to tunable Bragg reflector,” IEEE Quantum Electron. 30, 1801–1816 (1994).
    [Crossref]
  14. M. Bachmann, P. A. Sesse, H. Melchior, “Overlapping-image multimode interference couplers with a reduced number of self-images for uniform and nonuniform power splitting,” Appl. Opt. 34, 6898–6909 (1995).
    [Crossref] [PubMed]
  15. S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
    [Crossref]

2004 (1)

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

2003 (1)

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
[Crossref]

1996 (3)

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

C. R. Doerr, M. Zirngibl, C. H. Joyner, “Chirping of the waveguide grating router for free spectral range mode selection in the multifrequency laser,” IEEE Photon. Technol. Lett. 8, 500–502 (1996).
[Crossref]

C. R. Doerr, C. H. Joyner, M. Zirngibl, L. W. Stulz, “Chirped waveguide grating router multifrequency laser with absolute wavelength control,” IEEE Photon. Technol. Lett. 8, 1606–1608 (1996).
[Crossref]

1995 (2)

M. Bachmann, P. A. Sesse, H. Melchior, “Overlapping-image multimode interference couplers with a reduced number of self-images for uniform and nonuniform power splitting,” Appl. Opt. 34, 6898–6909 (1995).
[Crossref] [PubMed]

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

1994 (3)

J. P. Weber, “Optimization of the carrier-induced effective index in InGaAsP waveguides-Application to tunable Bragg reflector,” IEEE Quantum Electron. 30, 1801–1816 (1994).
[Crossref]

B. Glance, I. P. Kaminow, R. W. Wilson, “Applications of the integrated waveguide grating router,” J. Lightwave Technol. 12, 957–962 (1994).
[Crossref]

M. Zirngibl, C. H. Joyner, “12 frequency WDM laser based on a transmissive waveguide grating router,” Electron. Lett. 30, 701–702 (1994).
[Crossref]

1993 (2)

V. Jayaraman, Z. M. Chuang, L. Coldren, “Theory, design, and performance of extended tuning range semiconductor lasers with sampled gratings,” IEEE J. Quantum Electron. 29, 1824–1834 (1993).
[Crossref]

H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
[Crossref]

1990 (1)

B. R. Bennett, R. A. Soref, J. A. Del Alamo, “Carrier induced change in refractive index of InP, GaAs, and GaInAsP,” IEEE J. Quantum Electron. 26, 113–122 (1990).
[Crossref]

Bachmann, M.

Bennett, B. R.

B. R. Bennett, R. A. Soref, J. A. Del Alamo, “Carrier induced change in refractive index of InP, GaAs, and GaInAsP,” IEEE J. Quantum Electron. 26, 113–122 (1990).
[Crossref]

Chuang, Z. M.

V. Jayaraman, Z. M. Chuang, L. Coldren, “Theory, design, and performance of extended tuning range semiconductor lasers with sampled gratings,” IEEE J. Quantum Electron. 29, 1824–1834 (1993).
[Crossref]

Coldren, L.

V. Jayaraman, Z. M. Chuang, L. Coldren, “Theory, design, and performance of extended tuning range semiconductor lasers with sampled gratings,” IEEE J. Quantum Electron. 29, 1824–1834 (1993).
[Crossref]

Del Alamo, J. A.

B. R. Bennett, R. A. Soref, J. A. Del Alamo, “Carrier induced change in refractive index of InP, GaAs, and GaInAsP,” IEEE J. Quantum Electron. 26, 113–122 (1990).
[Crossref]

Doerr, C. R.

C. R. Doerr, M. Zirngibl, C. H. Joyner, “Chirping of the waveguide grating router for free spectral range mode selection in the multifrequency laser,” IEEE Photon. Technol. Lett. 8, 500–502 (1996).
[Crossref]

C. R. Doerr, C. H. Joyner, M. Zirngibl, L. W. Stulz, “Chirped waveguide grating router multifrequency laser with absolute wavelength control,” IEEE Photon. Technol. Lett. 8, 1606–1608 (1996).
[Crossref]

Fukuda, M.

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

Glance, B.

B. Glance, I. P. Kaminow, R. W. Wilson, “Applications of the integrated waveguide grating router,” J. Lightwave Technol. 12, 957–962 (1994).
[Crossref]

Iga, R.

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

Ishii, H.

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
[Crossref]

Itaya, Y.

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

Jayaraman, V.

V. Jayaraman, Z. M. Chuang, L. Coldren, “Theory, design, and performance of extended tuning range semiconductor lasers with sampled gratings,” IEEE J. Quantum Electron. 29, 1824–1834 (1993).
[Crossref]

Jeong, S.-H.

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

Joyner, C. H.

C. R. Doerr, M. Zirngibl, C. H. Joyner, “Chirping of the waveguide grating router for free spectral range mode selection in the multifrequency laser,” IEEE Photon. Technol. Lett. 8, 500–502 (1996).
[Crossref]

C. R. Doerr, C. H. Joyner, M. Zirngibl, L. W. Stulz, “Chirped waveguide grating router multifrequency laser with absolute wavelength control,” IEEE Photon. Technol. Lett. 8, 1606–1608 (1996).
[Crossref]

M. Zirngibl, C. H. Joyner, “12 frequency WDM laser based on a transmissive waveguide grating router,” Electron. Lett. 30, 701–702 (1994).
[Crossref]

Kadota, Y.

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

Kaminow, I. P.

B. Glance, I. P. Kaminow, R. W. Wilson, “Applications of the integrated waveguide grating router,” J. Lightwave Technol. 12, 957–962 (1994).
[Crossref]

Kano, F.

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

Kawaguchi, Y.

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

Kishi, K.

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

Kondo, Y.

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
[Crossref]

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

Matsumoto, S.

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

Matsuo, S.

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
[Crossref]

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of the European Conference on Optical Communication (ECOC), Italy, Th.1.2.3, pp. 884–885 (2003).

Melchior, H.

Ohiso, Y.

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of the European Conference on Optical Communication (ECOC), Italy, Th.1.2.3, pp. 884–885 (2003).

Okamoto, H.

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of the European Conference on Optical Communication (ECOC), Italy, Th.1.2.3, pp. 884–885 (2003).

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

Segawa, T.

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
[Crossref]

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of the European Conference on Optical Communication (ECOC), Italy, Th.1.2.3, pp. 884–885 (2003).

Sesse, P. A.

Soref, R. A.

B. R. Bennett, R. A. Soref, J. A. Del Alamo, “Carrier induced change in refractive index of InP, GaAs, and GaInAsP,” IEEE J. Quantum Electron. 26, 113–122 (1990).
[Crossref]

Stulz, L. W.

C. R. Doerr, C. H. Joyner, M. Zirngibl, L. W. Stulz, “Chirped waveguide grating router multifrequency laser with absolute wavelength control,” IEEE Photon. Technol. Lett. 8, 1606–1608 (1996).
[Crossref]

Suzuki, H.

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

Tamamura, T.

H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
[Crossref]

Tanobe, H.

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

Tohmori, Y.

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
[Crossref]

Weber, J. P.

J. P. Weber, “Optimization of the carrier-induced effective index in InGaAsP waveguides-Application to tunable Bragg reflector,” IEEE Quantum Electron. 30, 1801–1816 (1994).
[Crossref]

Wilson, R. W.

B. Glance, I. P. Kaminow, R. W. Wilson, “Applications of the integrated waveguide grating router,” J. Lightwave Technol. 12, 957–962 (1994).
[Crossref]

Yamamoto, M.

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

Yoshikuni, Y.

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
[Crossref]

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of the European Conference on Optical Communication (ECOC), Italy, Th.1.2.3, pp. 884–885 (2003).

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

Zirngibl, M.

C. R. Doerr, C. H. Joyner, M. Zirngibl, L. W. Stulz, “Chirped waveguide grating router multifrequency laser with absolute wavelength control,” IEEE Photon. Technol. Lett. 8, 1606–1608 (1996).
[Crossref]

C. R. Doerr, M. Zirngibl, C. H. Joyner, “Chirping of the waveguide grating router for free spectral range mode selection in the multifrequency laser,” IEEE Photon. Technol. Lett. 8, 500–502 (1996).
[Crossref]

M. Zirngibl, C. H. Joyner, “12 frequency WDM laser based on a transmissive waveguide grating router,” Electron. Lett. 30, 701–702 (1994).
[Crossref]

Appl. Opt. (1)

Electron. Lett. (3)

S. Matsumoto, R. Iga, Y. Kadota, M. Yamamoto, M. Fukuda, K. Kishi, Y. Itaya, “Low resistance 1.55 μm InGaAsP/InP semi-insulating buried heterostructure laser diode using a multilayer contact structure,” Electron. Lett. 31, 882–883 (1995).
[Crossref]

M. Zirngibl, C. H. Joyner, “12 frequency WDM laser based on a transmissive waveguide grating router,” Electron. Lett. 30, 701–702 (1994).
[Crossref]

S.-H. Jeong, S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Suzuki, “Chirped ladder-type interferometric filter for widely tunable laser diode,” Electron. Lett. 40, 990–991 (2004).
[Crossref]

IEEE J. Quantum Electron. (3)

V. Jayaraman, Z. M. Chuang, L. Coldren, “Theory, design, and performance of extended tuning range semiconductor lasers with sampled gratings,” IEEE J. Quantum Electron. 29, 1824–1834 (1993).
[Crossref]

H. Ishii, H. Tanobe, F. Kano, Y. Tohmori, Y. Kondo, Y. Yoshikuni, “Quasicontinuous wavelength tuning in superstructure grating (SSG) DBR lasers,” IEEE J. Quantum Electron. 32, 433–441 (1996).
[Crossref]

B. R. Bennett, R. A. Soref, J. A. Del Alamo, “Carrier induced change in refractive index of InP, GaAs, and GaInAsP,” IEEE J. Quantum Electron. 26, 113–122 (1990).
[Crossref]

IEEE Photon. Technol. Lett. (4)

H. Ishii, Y. Tohmori, Y. Yoshikuni, T. Tamamura, Y. Kondo, “Multiple phase shift super structure grating DBR lasers for broad wavelength tuning,” IEEE Photon. Technol. Lett. 5, 613–615 (1993).
[Crossref]

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “A widely tunable optical filter using ladder-type structure,” IEEE Photon. Technol. Lett. 15, 1114–1116 (2003).
[Crossref]

C. R. Doerr, M. Zirngibl, C. H. Joyner, “Chirping of the waveguide grating router for free spectral range mode selection in the multifrequency laser,” IEEE Photon. Technol. Lett. 8, 500–502 (1996).
[Crossref]

C. R. Doerr, C. H. Joyner, M. Zirngibl, L. W. Stulz, “Chirped waveguide grating router multifrequency laser with absolute wavelength control,” IEEE Photon. Technol. Lett. 8, 1606–1608 (1996).
[Crossref]

IEEE Quantum Electron. (1)

J. P. Weber, “Optimization of the carrier-induced effective index in InGaAsP waveguides-Application to tunable Bragg reflector,” IEEE Quantum Electron. 30, 1801–1816 (1994).
[Crossref]

J. Lightwave Technol. (1)

B. Glance, I. P. Kaminow, R. W. Wilson, “Applications of the integrated waveguide grating router,” J. Lightwave Technol. 12, 957–962 (1994).
[Crossref]

Other (2)

S. Matsuo, Y. Yoshikuni, T. Segawa, Y. Ohiso, H. Okamoto, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of the European Conference on Optical Communication (ECOC), Italy, Th.1.2.3, pp. 884–885 (2003).

S. Matsuo, S.-H. Jeong, T. Segawa, H. Okamoto, Y. Kawaguchi, Y. Kondo, H. Suzuki, Y. Yoshikuni, “Digitally tunable laser using ladder filter and ring resonator,” in Proceedings of International Semiconductor Laser Conference (ISLC), Japan, SaA1, pp. 139–140 (2004).

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Figures (19)

Fig. 1
Fig. 1

Schematic diagram of the digitally tunable semiconductor ring laser.

Fig. 2
Fig. 2

Schematic diagram of the ladder interferometric filter.

Fig. 3
Fig. 3

Calculation model of the single-stage ladder interferometer.

Fig. 4
Fig. 4

Calculated spectra for the single-stage and multistage ladder interferometric filters.

Fig. 5
Fig. 5

Calculated transmittance as a function of (a) the number of crossing waveguides (N) and (b) the diffraction order of the ladder interferometer (m).

Fig. 6
Fig. 6

Calculated 3 dB bandwidth and FSR as a function of m.

Fig. 7
Fig. 7

Schematic diagram of the chirped ladder interferometric filter.

Fig. 8
Fig. 8

Diffraction order distribution within the ladder interferometer for the uniform and chirped ladder filters.

Fig. 9
Fig. 9

Calculated spectra of (a) each single-stage and (b) multistage ladder interferometer when m0 = 40, N = 14, and γ = 2.

Fig. 10
Fig. 10

Calculated 3 dB bandwidth of the chirped ladder filter as a function of γ. The insets show the calculated spectra (linear scale) for γ = 1 and γ = 3.

Fig. 11
Fig. 11

Calculated extinction ratio of the chirped ladder filter as a function of γ.

Fig. 12
Fig. 12

Calculated optical path length of the chirped ladder filter as a function of γ.

Fig. 13
Fig. 13

Calculated γ required for >6 dB as a function of N. The insets show the calculated spectra (linear scale) for N = 8 and N = 18.

Fig. 14
Fig. 14

Calculated ER of the chirped ladder filter as a function of the wavelength shift (Δλ). The insets show the calculated spectra (linear scale) for Δλ = 0 and Δλ = 16 nm.

Fig. 15
Fig. 15

Calculated tuning characteristics of the chirped ladder filter (m0 = 40, N = 14, γ = 2). In the calculation, the wavelength-sensitive power-splitting ratio of the MMI coupler was considered.

Fig. 16
Fig. 16

Photographs of the fabricated ladder interferometric tunable filters. (a) Uniform and (b) chirped ladder filters (γ = 3) with m0 = 40, N = 10, and (c) chirped ladder filter with γ = 2, m0 = 40, N = 14.

Fig. 17
Fig. 17

Measured and calculated transmission spectra of the chirped ladder filters for (a) N = 10, γ = 3 and (b) N = 14, γ = 2.

Fig. 18
Fig. 18

Measured tuning characteristics for a nonchirped ladder filter for (a) N = 10 and chirped ladder filters for (b) N = 10, γ = 3 and (c) N = 14, γ = 2.

Fig. 19
Fig. 19

Measured wavelength shift as a function of the square-root value of the injection current (m0 = 40, N = 14, γ = 2). The inset shows the measured transmission spectra.

Equations (16)

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B 1 = ( 1 - κ 1 C ) 0.5 a 1 ,
B 2 = - j ( κ 1 C ) 0.5 a 1 ,
b 1 = B 2 exp [ - j Φ a ] ,
C 1 = a 2 exp [ - j Φ b ] ,
C 2 = B 1 exp [ - j Φ r ] ,
b 2 = - j ( κ 2 C ) 0.5 C 1 + ( 1 - κ 2 C ) 0.5 C 2 ,
[ b 1 b 2 ] = [ F 1 ] [ a 1 a 2 ] ,
[ F 1 ] = [ - j κ 1 C exp [ - j Φ a ] 0 1 - κ 1 C 1 - κ 2 C exp [ - j Φ r ] - j κ 2 C exp [ - j Φ b ] ] .
[ F ] = II p = 1 N - 1 [ F 1 ( p ) ] ,
λ 0 = ( n eff Δ S ) / m ,
Δ λ = ( Δ n eff L a or b ) / m ,
S p = m 0 + ( p - N / 2 ) γ n e f f λ 0 ,
λ 0 = ( n e f f S p ) / m .
Δ λ = ( Δ n e f f L p ) / m .
L p = m 0 + ( p - N / 2 ) γ m 0 L 0 ( L 0 is a fixed value ) .
[ F 2 ] = [ - j κ 1 C ( λ ) exp [ - j Φ a ] 0 κ 1 B ( λ ) κ 2 B ( λ ) exp [ - j Φ r ] - j κ 2 C ( λ ) exp [ - j Φ b ] ] ,

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