Abstract

We report the design and fabrication of a widely tunable optical bandpass filter based on using two identical long-period gratings formed along a polymer channel waveguide with a section of the waveguide core removed. The peak transmission of the passband of the fabricated filter is 60% and the bandwidth of the passband is 6  nm. The filter is thermally tunable over the C + L band (1520–1610 nm) for both TE and TM polarizations with a temperature control of 30°C.

© 2006 Optical Society of America

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  1. A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
    [CrossRef]
  2. P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
    [CrossRef]
  3. K. S. Chiang, Y. Liu, M. N. Ng, and S. Li, " Coupling between two parallel long- period fibre gratings," Electron. Lett. 36, 1408- 1409 ( 2000).
    [CrossRef]
  4. M. Das and K. Thyagarajan, " Dispersion compensation in transmission using uniform long period fiber gratings," Opt. Commun. 190, 159- 163 ( 2001).
    [CrossRef]
  5. V. Bhatia, D. Campbell, R. O. Claus, and A. M. Vengsarkar, " Simultaneous strain and temperature measurement with long-period gratins," Opt. Lett. 22, 648- 650 ( 1997).
    [CrossRef] [PubMed]
  6. M. N. Ng, Z. Chen, and K. S. Chiang, " Temperature compensation of long-period fiber grating for refractive-index sensing with bending effect," IEEE Photon. Technol. Lett. 14, 361- 362 ( 2002).
    [CrossRef]
  7. F. Bakhti and P. Sansonetti, " Realization of low back-reflection, wide-band fiber bandpass filters using phase shifted long-period fiber gratings," in Optical Fiber Communication Conference, Vol. 6 of 1997 OSA Technical Digest Series (Optical Society of America, 1997), p. 349.
    [CrossRef]
  8. H. Ke, K. S. Chiang, and J. H. Peng, " Analysis of phase-shifted long-period fiber gratings," IEEE Photon. Technol. Lett. 10, 1596- 1598 ( 1998).
    [CrossRef]
  9. D. S. Starodubov, V. Grubsky, and J. Feinberg, " All-fiber bandpass filter with adjustable transmission using cladding-mode coupling," IEEE Photon. Technol. Lett. 10, 1590- 1592 ( 1998).
    [CrossRef]
  10. S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
    [CrossRef]
  11. M. N. Ng and K. S. Chiang, " Thermal effects on the transmission spectra of long-period fiber gratings," Opt. Commun. 208, 321- 327 ( 2002).
    [CrossRef]
  12. V. Rastogi and K. S. Chiang, " Long-period gratings in planar optical waveguides," Appl. Opt. 41, 6351- 6355 ( 2002).
    [CrossRef] [PubMed]
  13. Q. Liu, K. S. Chiang, and V. Rastogi, " Analysis of corrugated long-period gratings in slab waveguides and their polarization dependence," J. Lightwave Technol. 21, 3399- 3405 ( 2003).
    [CrossRef]
  14. K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
    [CrossRef]
  15. Q. Liu, K. S. Chiang, and K. P. Lor, " Long-period gratings in polymer ridge waveguides," Opt. Exp. 13, 1150- 1160 ( 2005).
    [CrossRef]
  16. K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
    [CrossRef]
  17. Q. Liu, K. S. Chiang, K. P. Lor, and C. K. Chow, " Temperature sensitivity of a long-period waveguide grating in a channel waveguide," Appl. Phys. Lett. 86, 241115 ( 2005).
    [CrossRef]
  18. V. Grubsky, A. Skorucak, D. S. Starodubov, and J. Feinberg, " Fabrication of long- period fiber gratings with no harmonics," IEEE Photon. Technol. Lett. 11, 81- 89 ( 2001).
  19. F. Y. M. Chan and K. S. Chiang, " Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun. 244, 233- 243 ( 2005).
    [CrossRef]

2005

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

Q. Liu, K. S. Chiang, and K. P. Lor, " Long-period gratings in polymer ridge waveguides," Opt. Exp. 13, 1150- 1160 ( 2005).
[CrossRef]

Q. Liu, K. S. Chiang, K. P. Lor, and C. K. Chow, " Temperature sensitivity of a long-period waveguide grating in a channel waveguide," Appl. Phys. Lett. 86, 241115 ( 2005).
[CrossRef]

F. Y. M. Chan and K. S. Chiang, " Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun. 244, 233- 243 ( 2005).
[CrossRef]

2004

K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
[CrossRef]

2003

Q. Liu, K. S. Chiang, and V. Rastogi, " Analysis of corrugated long-period gratings in slab waveguides and their polarization dependence," J. Lightwave Technol. 21, 3399- 3405 ( 2003).
[CrossRef]

K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
[CrossRef]

2002

M. N. Ng and K. S. Chiang, " Thermal effects on the transmission spectra of long-period fiber gratings," Opt. Commun. 208, 321- 327 ( 2002).
[CrossRef]

V. Rastogi and K. S. Chiang, " Long-period gratings in planar optical waveguides," Appl. Opt. 41, 6351- 6355 ( 2002).
[CrossRef] [PubMed]

M. N. Ng, Z. Chen, and K. S. Chiang, " Temperature compensation of long-period fiber grating for refractive-index sensing with bending effect," IEEE Photon. Technol. Lett. 14, 361- 362 ( 2002).
[CrossRef]

2001

M. Das and K. Thyagarajan, " Dispersion compensation in transmission using uniform long period fiber gratings," Opt. Commun. 190, 159- 163 ( 2001).
[CrossRef]

V. Grubsky, A. Skorucak, D. S. Starodubov, and J. Feinberg, " Fabrication of long- period fiber gratings with no harmonics," IEEE Photon. Technol. Lett. 11, 81- 89 ( 2001).

2000

K. S. Chiang, Y. Liu, M. N. Ng, and S. Li, " Coupling between two parallel long- period fibre gratings," Electron. Lett. 36, 1408- 1409 ( 2000).
[CrossRef]

1998

H. Ke, K. S. Chiang, and J. H. Peng, " Analysis of phase-shifted long-period fiber gratings," IEEE Photon. Technol. Lett. 10, 1596- 1598 ( 1998).
[CrossRef]

D. S. Starodubov, V. Grubsky, and J. Feinberg, " All-fiber bandpass filter with adjustable transmission using cladding-mode coupling," IEEE Photon. Technol. Lett. 10, 1590- 1592 ( 1998).
[CrossRef]

1997

1996

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

1992

P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
[CrossRef]

Andrejco, M.

P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
[CrossRef]

Bakhti, F.

F. Bakhti and P. Sansonetti, " Realization of low back-reflection, wide-band fiber bandpass filters using phase shifted long-period fiber gratings," in Optical Fiber Communication Conference, Vol. 6 of 1997 OSA Technical Digest Series (Optical Society of America, 1997), p. 349.
[CrossRef]

Bhatia, V.

V. Bhatia, D. Campbell, R. O. Claus, and A. M. Vengsarkar, " Simultaneous strain and temperature measurement with long-period gratins," Opt. Lett. 22, 648- 650 ( 1997).
[CrossRef] [PubMed]

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

Campbell, D.

Chan, F. Y. M.

F. Y. M. Chan and K. S. Chiang, " Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun. 244, 233- 243 ( 2005).
[CrossRef]

Chan, H. P.

K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
[CrossRef]

K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
[CrossRef]

Chen, Z.

M. N. Ng, Z. Chen, and K. S. Chiang, " Temperature compensation of long-period fiber grating for refractive-index sensing with bending effect," IEEE Photon. Technol. Lett. 14, 361- 362 ( 2002).
[CrossRef]

Chiang, K. S.

Q. Liu, K. S. Chiang, K. P. Lor, and C. K. Chow, " Temperature sensitivity of a long-period waveguide grating in a channel waveguide," Appl. Phys. Lett. 86, 241115 ( 2005).
[CrossRef]

Q. Liu, K. S. Chiang, and K. P. Lor, " Long-period gratings in polymer ridge waveguides," Opt. Exp. 13, 1150- 1160 ( 2005).
[CrossRef]

F. Y. M. Chan and K. S. Chiang, " Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun. 244, 233- 243 ( 2005).
[CrossRef]

K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
[CrossRef]

K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
[CrossRef]

Q. Liu, K. S. Chiang, and V. Rastogi, " Analysis of corrugated long-period gratings in slab waveguides and their polarization dependence," J. Lightwave Technol. 21, 3399- 3405 ( 2003).
[CrossRef]

V. Rastogi and K. S. Chiang, " Long-period gratings in planar optical waveguides," Appl. Opt. 41, 6351- 6355 ( 2002).
[CrossRef] [PubMed]

M. N. Ng and K. S. Chiang, " Thermal effects on the transmission spectra of long-period fiber gratings," Opt. Commun. 208, 321- 327 ( 2002).
[CrossRef]

M. N. Ng, Z. Chen, and K. S. Chiang, " Temperature compensation of long-period fiber grating for refractive-index sensing with bending effect," IEEE Photon. Technol. Lett. 14, 361- 362 ( 2002).
[CrossRef]

K. S. Chiang, Y. Liu, M. N. Ng, and S. Li, " Coupling between two parallel long- period fibre gratings," Electron. Lett. 36, 1408- 1409 ( 2000).
[CrossRef]

H. Ke, K. S. Chiang, and J. H. Peng, " Analysis of phase-shifted long-period fiber gratings," IEEE Photon. Technol. Lett. 10, 1596- 1598 ( 1998).
[CrossRef]

Choi, S.

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

Chow, C. K.

Q. Liu, K. S. Chiang, K. P. Lor, and C. K. Chow, " Temperature sensitivity of a long-period waveguide grating in a channel waveguide," Appl. Phys. Lett. 86, 241115 ( 2005).
[CrossRef]

K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
[CrossRef]

K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
[CrossRef]

Chu, Y. M.

K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
[CrossRef]

Claus, R. O.

Das, M.

M. Das and K. Thyagarajan, " Dispersion compensation in transmission using uniform long period fiber gratings," Opt. Commun. 190, 159- 163 ( 2001).
[CrossRef]

Eom, T. J.

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

Erdogan, T.

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

Espindola, R. P.

P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
[CrossRef]

Feinberg, J.

V. Grubsky, A. Skorucak, D. S. Starodubov, and J. Feinberg, " Fabrication of long- period fiber gratings with no harmonics," IEEE Photon. Technol. Lett. 11, 81- 89 ( 2001).

D. S. Starodubov, V. Grubsky, and J. Feinberg, " All-fiber bandpass filter with adjustable transmission using cladding-mode coupling," IEEE Photon. Technol. Lett. 10, 1590- 1592 ( 1998).
[CrossRef]

Grubsky, V.

V. Grubsky, A. Skorucak, D. S. Starodubov, and J. Feinberg, " Fabrication of long- period fiber gratings with no harmonics," IEEE Photon. Technol. Lett. 11, 81- 89 ( 2001).

D. S. Starodubov, V. Grubsky, and J. Feinberg, " All-fiber bandpass filter with adjustable transmission using cladding-mode coupling," IEEE Photon. Technol. Lett. 10, 1590- 1592 ( 1998).
[CrossRef]

Judkins, J. B.

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
[CrossRef]

Jung, Y.

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

Ke, H.

H. Ke, K. S. Chiang, and J. H. Peng, " Analysis of phase-shifted long-period fiber gratings," IEEE Photon. Technol. Lett. 10, 1596- 1598 ( 1998).
[CrossRef]

Lee, B. H.

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

Lee, J. W.

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

Lemaire, P. J.

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

Li, S.

K. S. Chiang, Y. Liu, M. N. Ng, and S. Li, " Coupling between two parallel long- period fibre gratings," Electron. Lett. 36, 1408- 1409 ( 2000).
[CrossRef]

Liu, Q.

Q. Liu, K. S. Chiang, and K. P. Lor, " Long-period gratings in polymer ridge waveguides," Opt. Exp. 13, 1150- 1160 ( 2005).
[CrossRef]

Q. Liu, K. S. Chiang, K. P. Lor, and C. K. Chow, " Temperature sensitivity of a long-period waveguide grating in a channel waveguide," Appl. Phys. Lett. 86, 241115 ( 2005).
[CrossRef]

K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
[CrossRef]

Q. Liu, K. S. Chiang, and V. Rastogi, " Analysis of corrugated long-period gratings in slab waveguides and their polarization dependence," J. Lightwave Technol. 21, 3399- 3405 ( 2003).
[CrossRef]

Liu, Y.

K. S. Chiang, Y. Liu, M. N. Ng, and S. Li, " Coupling between two parallel long- period fibre gratings," Electron. Lett. 36, 1408- 1409 ( 2000).
[CrossRef]

Lor, K. P.

Q. Liu, K. S. Chiang, K. P. Lor, and C. K. Chow, " Temperature sensitivity of a long-period waveguide grating in a channel waveguide," Appl. Phys. Lett. 86, 241115 ( 2005).
[CrossRef]

Q. Liu, K. S. Chiang, and K. P. Lor, " Long-period gratings in polymer ridge waveguides," Opt. Exp. 13, 1150- 1160 ( 2005).
[CrossRef]

K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
[CrossRef]

K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
[CrossRef]

Ng, M. N.

M. N. Ng and K. S. Chiang, " Thermal effects on the transmission spectra of long-period fiber gratings," Opt. Commun. 208, 321- 327 ( 2002).
[CrossRef]

M. N. Ng, Z. Chen, and K. S. Chiang, " Temperature compensation of long-period fiber grating for refractive-index sensing with bending effect," IEEE Photon. Technol. Lett. 14, 361- 362 ( 2002).
[CrossRef]

K. S. Chiang, Y. Liu, M. N. Ng, and S. Li, " Coupling between two parallel long- period fibre gratings," Electron. Lett. 36, 1408- 1409 ( 2000).
[CrossRef]

Oh, K.

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

Peng, J. H.

H. Ke, K. S. Chiang, and J. H. Peng, " Analysis of phase-shifted long-period fiber gratings," IEEE Photon. Technol. Lett. 10, 1596- 1598 ( 1998).
[CrossRef]

Rastogi, V.

Sansonetti, P.

F. Bakhti and P. Sansonetti, " Realization of low back-reflection, wide-band fiber bandpass filters using phase shifted long-period fiber gratings," in Optical Fiber Communication Conference, Vol. 6 of 1997 OSA Technical Digest Series (Optical Society of America, 1997), p. 349.
[CrossRef]

Sipe, J. E.

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

Skorucak, A.

V. Grubsky, A. Skorucak, D. S. Starodubov, and J. Feinberg, " Fabrication of long- period fiber gratings with no harmonics," IEEE Photon. Technol. Lett. 11, 81- 89 ( 2001).

Starodubov, D. S.

V. Grubsky, A. Skorucak, D. S. Starodubov, and J. Feinberg, " Fabrication of long- period fiber gratings with no harmonics," IEEE Photon. Technol. Lett. 11, 81- 89 ( 2001).

D. S. Starodubov, V. Grubsky, and J. Feinberg, " All-fiber bandpass filter with adjustable transmission using cladding-mode coupling," IEEE Photon. Technol. Lett. 10, 1590- 1592 ( 1998).
[CrossRef]

Thyagarajan, K.

M. Das and K. Thyagarajan, " Dispersion compensation in transmission using uniform long period fiber gratings," Opt. Commun. 190, 159- 163 ( 2001).
[CrossRef]

Vengsarkar, A. M.

V. Bhatia, D. Campbell, R. O. Claus, and A. M. Vengsarkar, " Simultaneous strain and temperature measurement with long-period gratins," Opt. Lett. 22, 648- 650 ( 1997).
[CrossRef] [PubMed]

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
[CrossRef]

Wysocki, P. F.

P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
[CrossRef]

Appl. Opt.

Appl. Phys. Lett.

Q. Liu, K. S. Chiang, K. P. Lor, and C. K. Chow, " Temperature sensitivity of a long-period waveguide grating in a channel waveguide," Appl. Phys. Lett. 86, 241115 ( 2005).
[CrossRef]

Electron. Lett.

K. S. Chiang, Y. Liu, M. N. Ng, and S. Li, " Coupling between two parallel long- period fibre gratings," Electron. Lett. 36, 1408- 1409 ( 2000).
[CrossRef]

K. S. Chiang, C. K. Chow, H. P. Chan, Q. Liu and K. P. Lor, " Widely tunable polymer long-period waveguide grating with polarisation-insensitive resonance wavelength," Electron. Lett. 40, 422- 424 ( 2004).
[CrossRef]

IEEE Photon. Technol. Lett.

P. F. Wysocki, J. B. Judkins, R. P. Espindola, M. Andrejco, and A. M. Vengsarkar, " Broad-band erbium-droped fiber amplifier flattened beyond 40 nm using long- period grating filter," IEEE Photon. Technol. Lett. 9, 1343- 1345 ( 1992).
[CrossRef]

H. Ke, K. S. Chiang, and J. H. Peng, " Analysis of phase-shifted long-period fiber gratings," IEEE Photon. Technol. Lett. 10, 1596- 1598 ( 1998).
[CrossRef]

D. S. Starodubov, V. Grubsky, and J. Feinberg, " All-fiber bandpass filter with adjustable transmission using cladding-mode coupling," IEEE Photon. Technol. Lett. 10, 1590- 1592 ( 1998).
[CrossRef]

S. Choi, T. J. Eom, Y. Jung, B. H. Lee, J. W. Lee, and K. Oh, " Broad-band tunable all-fiber bandpass filter based on hollow optical fiber and long-period grating pair," IEEE Photon. Technol. Lett. 17, 115- 117 ( 2005).
[CrossRef]

V. Grubsky, A. Skorucak, D. S. Starodubov, and J. Feinberg, " Fabrication of long- period fiber gratings with no harmonics," IEEE Photon. Technol. Lett. 11, 81- 89 ( 2001).

K. S. Chiang, K. P. Lor, C. K. Chow, H. P. Chan, V. Rastogi, and Y. M. Chu, " Widely tunable long-period gratings fabricated in polymer-clad ion-exchanged glass waveguides," IEEE Photon. Technol. Lett. 15, 1094- 1096 ( 2003).
[CrossRef]

M. N. Ng, Z. Chen, and K. S. Chiang, " Temperature compensation of long-period fiber grating for refractive-index sensing with bending effect," IEEE Photon. Technol. Lett. 14, 361- 362 ( 2002).
[CrossRef]

J. Lightwave Technol.

Q. Liu, K. S. Chiang, and V. Rastogi, " Analysis of corrugated long-period gratings in slab waveguides and their polarization dependence," J. Lightwave Technol. 21, 3399- 3405 ( 2003).
[CrossRef]

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, " Long-period fiber gratings as band-rejection filters," J. Lightwave Technol. 14, 58- 65 ( 1996).
[CrossRef]

Opt. Commun.

M. Das and K. Thyagarajan, " Dispersion compensation in transmission using uniform long period fiber gratings," Opt. Commun. 190, 159- 163 ( 2001).
[CrossRef]

M. N. Ng and K. S. Chiang, " Thermal effects on the transmission spectra of long-period fiber gratings," Opt. Commun. 208, 321- 327 ( 2002).
[CrossRef]

F. Y. M. Chan and K. S. Chiang, " Analysis of apodized phase-shifted long-period fiber gratings," Opt. Commun. 244, 233- 243 ( 2005).
[CrossRef]

Opt. Exp.

Q. Liu, K. S. Chiang, and K. P. Lor, " Long-period gratings in polymer ridge waveguides," Opt. Exp. 13, 1150- 1160 ( 2005).
[CrossRef]

Opt. Lett.

Other

F. Bakhti and P. Sansonetti, " Realization of low back-reflection, wide-band fiber bandpass filters using phase shifted long-period fiber gratings," in Optical Fiber Communication Conference, Vol. 6 of 1997 OSA Technical Digest Series (Optical Society of America, 1997), p. 349.
[CrossRef]

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Figures (7)

Fig. 1
Fig. 1

Bandpass filter consists of two identical corrugated LPGs in an epoxy-clad BCB channel waveguide with a gap where the core is absent. Light is confined in the x and y directions and propagates in the z direction.

Fig. 2
Fig. 2

Normalized transmission power of the core mode and the cladding mode through the gap as a function of the gap distance calculated at three wavelengths for (a) TE polarization and (b) TM polarization.

Fig. 3
Fig. 3

BPM simulation of the propagation of (a) the core mode and (b) the cladding mode through a gap of 500 μm (indicated by the dashed lines) at the 1550-nm wavelength for TE polarization along the center axis of the structure.

Fig. 4
Fig. 4

(a) Optical image of a set of fabricated unclad band-rejection filters and bandpass filters; (b) scanning electron microscope image of an unclad channel waveguide.

Fig. 5
Fig. 5

Normalized transmission spectra of a typical fabricated LPWG band-rejection filter measured at different temperatures for (a) TE polarization and (b) TM polarization.

Fig. 6
Fig. 6

Normalized transmission spectra of a typical fabricated LPWG bandpass filter measured at different temperatures for (a) TE polarization and (b) TM polarization.

Fig. 7
Fig. 7

Temperature dependence of the peak wavelength of the passband of the filter.

Equations (1)

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λ 0 = ( N co N cl ) Λ ,

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