Abstract

We propose a pulse shaping and shortening technique for pulses generated from gain switched single mode semiconductor lasers, based on a Mach Zehnder interferometer with variable delay. The spectral and temporal characteristics of the pulses obtained with the proposed technique are investigated with numerical simulations. Experiments are performed with a Distributed Feedback laser and a Vertical Cavity Surface Emitting Laser, emitting at 1.5 µm, obtaining pulse duration reduction of 25-30%. The main asset of the proposed technique is that it can be applied to different devices and pulses, taking advantage of the flexibility of the gain switching technique.

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References

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  1. K. Y. Lau, “Gain switching of semiconductor injection lasers,” Appl. Phys. Lett. 52(4), 257–259 (1988).
    [CrossRef]
  2. P. P. Vasil'ev, I. H. White, and J. Gowar, “Fast phenomena in semiconductor lasers,” Rep. Prog. Phys. 63(12), 1997–2042 (2000).
    [CrossRef]
  3. P. Paulus, R. Langenhorst, and D. Jager, “Generation and Optimum Control of Picosecond Optical Pulses from Gain-Switched Semiconductor-Lasers,” IEEE J. Quantum Electron. 24(8), 1519–1523 (1988).
    [CrossRef]
  4. R. J. Helkey and Y. Arakawa, “Cavity optimization for minimum pulsewidth of gain-switched semiconductor lasers,” IEEE Photon. Technol. Lett. 7(3), 272–274 (1995).
    [CrossRef]
  5. A. Takada, T. Sugie, and M. Saruwatari, “High-speed picosecond optical pulse compression from gain-switched 1.3-µm distributed feedback-laser diode (DFB-LD) through highly dispersive single-mode fiber,” J. Lightwave Technol. 5(10), 1525–1533 (1987).
    [CrossRef]
  6. H.-F. Liu, Y. Ogawa, and S. Oshiba, “Generation of an extremely short single mode pulse (2 ps) by fiber compression of a gain-switched pulse from a 1.3 µm distributed feedback laser diode,” Appl. Phys. Lett. 59(11), 1284–1286 (1991).
    [CrossRef]
  7. D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
    [CrossRef]
  8. M. Nakazawa, K. Suzuki, and Y. Kimura, “Transform-limited pulse generation in the gigahertz region from a gain-switched distributed-feedback laser diode using spectral windowing,” Opt. Lett. 15(12), 715–717 (1990).
    [CrossRef] [PubMed]
  9. K. Wada, S. Takamatsu, H. Watanebe, T. Matsuyama, and H. Horinaka, “Pulse-shaping of gain-switched pulse from multimode laser diode using fiber Sagnac interferometer,” Opt. Express 16(24), 19872–19881 (2008).
    [CrossRef] [PubMed]
  10. C. de Dios and H. Lamela, “Compression and Reshaping of Gain-Switching Low-Quality Pulses Using a Highly Nonlinear Optical Loop Mirror,” IEEE Photon. Technol. Lett. 22(6), 377–379 (2010).
    [CrossRef]
  11. K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
    [CrossRef]
  12. K. Wada and Y. Cho, “Improved expression for the time-bandwidth product of picosecond optical pulses from gain-switched semiconductor lasers,” Opt. Lett. 19(20), 1633–1635 (1994).
    [CrossRef] [PubMed]
  13. A. Consoli, J. M. Tijero, and I. Esquivias, “Time resolved chirp measurements of gain switched semiconductor laser using a polarization based optical differentiator,” Opt. Express 19(11), 10805–10812 (2011).
    [CrossRef] [PubMed]
  14. J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
    [CrossRef]
  15. A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
    [CrossRef]

2011 (1)

2010 (2)

C. de Dios and H. Lamela, “Compression and Reshaping of Gain-Switching Low-Quality Pulses Using a Highly Nonlinear Optical Loop Mirror,” IEEE Photon. Technol. Lett. 22(6), 377–379 (2010).
[CrossRef]

A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
[CrossRef]

2008 (1)

2001 (1)

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

2000 (1)

P. P. Vasil'ev, I. H. White, and J. Gowar, “Fast phenomena in semiconductor lasers,” Rep. Prog. Phys. 63(12), 1997–2042 (2000).
[CrossRef]

1999 (1)

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

1996 (1)

K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
[CrossRef]

1995 (1)

R. J. Helkey and Y. Arakawa, “Cavity optimization for minimum pulsewidth of gain-switched semiconductor lasers,” IEEE Photon. Technol. Lett. 7(3), 272–274 (1995).
[CrossRef]

1994 (1)

1991 (1)

H.-F. Liu, Y. Ogawa, and S. Oshiba, “Generation of an extremely short single mode pulse (2 ps) by fiber compression of a gain-switched pulse from a 1.3 µm distributed feedback laser diode,” Appl. Phys. Lett. 59(11), 1284–1286 (1991).
[CrossRef]

1990 (1)

1988 (2)

K. Y. Lau, “Gain switching of semiconductor injection lasers,” Appl. Phys. Lett. 52(4), 257–259 (1988).
[CrossRef]

P. Paulus, R. Langenhorst, and D. Jager, “Generation and Optimum Control of Picosecond Optical Pulses from Gain-Switched Semiconductor-Lasers,” IEEE J. Quantum Electron. 24(8), 1519–1523 (1988).
[CrossRef]

1987 (1)

A. Takada, T. Sugie, and M. Saruwatari, “High-speed picosecond optical pulse compression from gain-switched 1.3-µm distributed feedback-laser diode (DFB-LD) through highly dispersive single-mode fiber,” J. Lightwave Technol. 5(10), 1525–1533 (1987).
[CrossRef]

Akage, Y.

K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
[CrossRef]

Arakawa, Y.

R. J. Helkey and Y. Arakawa, “Cavity optimization for minimum pulsewidth of gain-switched semiconductor lasers,” IEEE Photon. Technol. Lett. 7(3), 272–274 (1995).
[CrossRef]

Balle, S.

A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
[CrossRef]

Barry, L. P.

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

Bennion, I.

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

Birkin, D. J. L.

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

Bollond, P. G.

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

Cho, Y.

K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
[CrossRef]

K. Wada and Y. Cho, “Improved expression for the time-bandwidth product of picosecond optical pulses from gain-switched semiconductor lasers,” Opt. Lett. 19(20), 1633–1635 (1994).
[CrossRef] [PubMed]

Consoli, A.

A. Consoli, J. M. Tijero, and I. Esquivias, “Time resolved chirp measurements of gain switched semiconductor laser using a polarization based optical differentiator,” Opt. Express 19(11), 10805–10812 (2011).
[CrossRef] [PubMed]

A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
[CrossRef]

de Dios, C.

C. de Dios and H. Lamela, “Compression and Reshaping of Gain-Switching Low-Quality Pulses Using a Highly Nonlinear Optical Loop Mirror,” IEEE Photon. Technol. Lett. 22(6), 377–379 (2010).
[CrossRef]

Dudley, J. M.

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

Esquivias, I.

A. Consoli, J. M. Tijero, and I. Esquivias, “Time resolved chirp measurements of gain switched semiconductor laser using a polarization based optical differentiator,” Opt. Express 19(11), 10805–10812 (2011).
[CrossRef] [PubMed]

A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
[CrossRef]

Gowar, J.

P. P. Vasil'ev, I. H. White, and J. Gowar, “Fast phenomena in semiconductor lasers,” Rep. Prog. Phys. 63(12), 1997–2042 (2000).
[CrossRef]

Harvey, J. D.

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

Helkey, R. J.

R. J. Helkey and Y. Arakawa, “Cavity optimization for minimum pulsewidth of gain-switched semiconductor lasers,” IEEE Photon. Technol. Lett. 7(3), 272–274 (1995).
[CrossRef]

Hernandez, F. J. L.

A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
[CrossRef]

Horinaka, H.

K. Wada, S. Takamatsu, H. Watanebe, T. Matsuyama, and H. Horinaka, “Pulse-shaping of gain-switched pulse from multimode laser diode using fiber Sagnac interferometer,” Opt. Express 16(24), 19872–19881 (2008).
[CrossRef] [PubMed]

K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
[CrossRef]

Jager, D.

P. Paulus, R. Langenhorst, and D. Jager, “Generation and Optimum Control of Picosecond Optical Pulses from Gain-Switched Semiconductor-Lasers,” IEEE J. Quantum Electron. 24(8), 1519–1523 (1988).
[CrossRef]

Kimura, Y.

Lamela, H.

C. de Dios and H. Lamela, “Compression and Reshaping of Gain-Switching Low-Quality Pulses Using a Highly Nonlinear Optical Loop Mirror,” IEEE Photon. Technol. Lett. 22(6), 377–379 (2010).
[CrossRef]

Langenhorst, R.

P. Paulus, R. Langenhorst, and D. Jager, “Generation and Optimum Control of Picosecond Optical Pulses from Gain-Switched Semiconductor-Lasers,” IEEE J. Quantum Electron. 24(8), 1519–1523 (1988).
[CrossRef]

Lau, K. Y.

K. Y. Lau, “Gain switching of semiconductor injection lasers,” Appl. Phys. Lett. 52(4), 257–259 (1988).
[CrossRef]

Leonhardt, R.

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

Liu, H.-F.

H.-F. Liu, Y. Ogawa, and S. Oshiba, “Generation of an extremely short single mode pulse (2 ps) by fiber compression of a gain-switched pulse from a 1.3 µm distributed feedback laser diode,” Appl. Phys. Lett. 59(11), 1284–1286 (1991).
[CrossRef]

Liu, Y.

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

Marui, H.

K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
[CrossRef]

Matsuyama, T.

Mulet, J.

A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
[CrossRef]

Nakazawa, M.

Ogawa, Y.

H.-F. Liu, Y. Ogawa, and S. Oshiba, “Generation of an extremely short single mode pulse (2 ps) by fiber compression of a gain-switched pulse from a 1.3 µm distributed feedback laser diode,” Appl. Phys. Lett. 59(11), 1284–1286 (1991).
[CrossRef]

Oshiba, S.

H.-F. Liu, Y. Ogawa, and S. Oshiba, “Generation of an extremely short single mode pulse (2 ps) by fiber compression of a gain-switched pulse from a 1.3 µm distributed feedback laser diode,” Appl. Phys. Lett. 59(11), 1284–1286 (1991).
[CrossRef]

Paulus, P.

P. Paulus, R. Langenhorst, and D. Jager, “Generation and Optimum Control of Picosecond Optical Pulses from Gain-Switched Semiconductor-Lasers,” IEEE J. Quantum Electron. 24(8), 1519–1523 (1988).
[CrossRef]

Rafailov, E. U.

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

Saruwatari, M.

A. Takada, T. Sugie, and M. Saruwatari, “High-speed picosecond optical pulse compression from gain-switched 1.3-µm distributed feedback-laser diode (DFB-LD) through highly dispersive single-mode fiber,” J. Lightwave Technol. 5(10), 1525–1533 (1987).
[CrossRef]

Sibbett, W.

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

Sugie, T.

A. Takada, T. Sugie, and M. Saruwatari, “High-speed picosecond optical pulse compression from gain-switched 1.3-µm distributed feedback-laser diode (DFB-LD) through highly dispersive single-mode fiber,” J. Lightwave Technol. 5(10), 1525–1533 (1987).
[CrossRef]

Suzuki, K.

Takada, A.

A. Takada, T. Sugie, and M. Saruwatari, “High-speed picosecond optical pulse compression from gain-switched 1.3-µm distributed feedback-laser diode (DFB-LD) through highly dispersive single-mode fiber,” J. Lightwave Technol. 5(10), 1525–1533 (1987).
[CrossRef]

Takamatsu, S.

Thomsen, B. C.

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

Thomson, M. D.

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

Tijero, J. M.

Vasil'ev, P. P.

P. P. Vasil'ev, I. H. White, and J. Gowar, “Fast phenomena in semiconductor lasers,” Rep. Prog. Phys. 63(12), 1997–2042 (2000).
[CrossRef]

Wada, K.

Watanebe, H.

White, I. H.

P. P. Vasil'ev, I. H. White, and J. Gowar, “Fast phenomena in semiconductor lasers,” Rep. Prog. Phys. 63(12), 1997–2042 (2000).
[CrossRef]

Yamamoto, N.

K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
[CrossRef]

Zhang, L.

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

Appl. Phys. Lett. (3)

K. Y. Lau, “Gain switching of semiconductor injection lasers,” Appl. Phys. Lett. 52(4), 257–259 (1988).
[CrossRef]

H.-F. Liu, Y. Ogawa, and S. Oshiba, “Generation of an extremely short single mode pulse (2 ps) by fiber compression of a gain-switched pulse from a 1.3 µm distributed feedback laser diode,” Appl. Phys. Lett. 59(11), 1284–1286 (1991).
[CrossRef]

D. J. L. Birkin, E. U. Rafailov, W. Sibbett, L. Zhang, Y. Liu, and I. Bennion, “Near-transform-limited picosecond pulses from a gain-switched InGaAs diode laser with fiber Bragg gratings,” Appl. Phys. Lett. 79(2), 151–152 (2001).
[CrossRef]

IEEE J. Quantum Electron. (2)

P. Paulus, R. Langenhorst, and D. Jager, “Generation and Optimum Control of Picosecond Optical Pulses from Gain-Switched Semiconductor-Lasers,” IEEE J. Quantum Electron. 24(8), 1519–1523 (1988).
[CrossRef]

J. M. Dudley, L. P. Barry, J. D. Harvey, M. D. Thomson, B. C. Thomsen, P. G. Bollond, and R. Leonhardt, “Complete characterization of ultrashort pulse sources at 1550 nm,” IEEE J. Quantum Electron. 35(4), 441–450 (1999).
[CrossRef]

IEEE Photon. Technol. Lett. (3)

A. Consoli, I. Esquivias, F. J. L. Hernandez, J. Mulet, and S. Balle, “Characterization of Gain-Switched Pulses From 1.55-µm VCSEL,” IEEE Photon. Technol. Lett. 22(11), 772–774 (2010).
[CrossRef]

R. J. Helkey and Y. Arakawa, “Cavity optimization for minimum pulsewidth of gain-switched semiconductor lasers,” IEEE Photon. Technol. Lett. 7(3), 272–274 (1995).
[CrossRef]

C. de Dios and H. Lamela, “Compression and Reshaping of Gain-Switching Low-Quality Pulses Using a Highly Nonlinear Optical Loop Mirror,” IEEE Photon. Technol. Lett. 22(6), 377–379 (2010).
[CrossRef]

J. Lightwave Technol. (1)

A. Takada, T. Sugie, and M. Saruwatari, “High-speed picosecond optical pulse compression from gain-switched 1.3-µm distributed feedback-laser diode (DFB-LD) through highly dispersive single-mode fiber,” J. Lightwave Technol. 5(10), 1525–1533 (1987).
[CrossRef]

Opt. Commun. (1)

K. Wada, Y. Akage, H. Marui, H. Horinaka, N. Yamamoto, and Y. Cho, “Simple method for determining the gain saturation coefficient of a distributed feedback semiconductor laser,” Opt. Commun. 130(1-3), 57–62 (1996).
[CrossRef]

Opt. Express (2)

Opt. Lett. (2)

Rep. Prog. Phys. (1)

P. P. Vasil'ev, I. H. White, and J. Gowar, “Fast phenomena in semiconductor lasers,” Rep. Prog. Phys. 63(12), 1997–2042 (2000).
[CrossRef]

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Figures (6)

Fig. 1
Fig. 1

Simulations results obtained with fGS = 1 GHz, IBIAS = 1.5 ITH and IAMP = 4 ITH: carrier density and chirp temporal profiles, (a), pulse intensity and phase versus time, (b), group delay, (c) and pulse spectral intensity and phase, (d).

Fig. 2
Fig. 2

Simulation results with fGS = 1 GHz, IBIAS = 1.5 ITH and IAMP = 4 ITH and τ = 12.317 ps. (a): normalized pulse spectra at the input (black line) and at the output (red line) of the interferometer and interferometer TF (dashed line). (b): normalized intensity and chirp temporal profiles of the pulse at the input (black line and dots) and at the output (red line and dots) of the interferometer.

Fig. 3
Fig. 3

Experimental set-up. Detailed description is given in the text.

Fig. 4
Fig. 4

Experimental results obtained with the VCSEL, for IBIAS = 1.6 ITH, PRF = 14 dBm at 1 GHz. (a): pulse spectra at the input (black line) and output (red line) of the interferometer and interferometer TF (dashed line). (b): pulse temporal profile at the input (black line) and output (red line) of the interferometer.

Fig. 5
Fig. 5

Experimental results obtained with the DFB laser, for IBIAS = 1.1 ITH, PRF = 17 dBm at 1 GHz. (a): pulse spectra at the input (black line) and output (red line) of the interferometer and interferometer TF (dashed line). (b): pulse temporal profile at the input (black line) and output (red line) of the interferometer.

Fig. 6
Fig. 6

Pulse durations obtained with the GS DFB laser (a) and the GS VCSEL (b) as a function of PRF, measured at the input (solid dots) and output (hollow circles) of the interferometer. For both lasers, fGS = 1GHz and IBIAS = 1.1 ITH and IBIAS = 1.6 ITH, for the DFB laser and the VCSEL, respectively.

Tables (1)

Tables Icon

Table 1 1550 nm VCSEL Parameters

Equations (3)

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dN(t) dt = I(t) q V act N(t) τ N v G dG dN (N(t) N 0 ) 1+εS S(t)
dS(t) dt = v G Γ dG dN (N(t) N 0 ) 1+εS(t) S(t) S(t) τ P +βΓ N(t) τ N
dφ(t) dt = α 2 ( v G Γ dG dN (N(t) N 0 ) 1 τ P )

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