ICTACT Journal on Microelectronics

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Chirp Reduction in a Single Mode DM-SQW-DFB Laser Operated at Second Quantization State


Affiliations
1 Department of Electronics and Communication Engineering, National Institute of Technology, Srinagar, India
     

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We have observed the reduction in the chirp parameters (gain compression and above threshold α-factor) by operating the single quantum well laser at second quantization state. In this study, the carrier density at threshold is clamped by increasing the total cavity loss, so that the second energy level is populated leading to operation at second quantization state. We have identified wavelength shift towards the shorter wavelength side of the spectrum. Implies higher differential gain of the lasing mode, consequently decreases the effect of chirping in a directly modulated single QW laser.

Keywords

Directly Modulated (DM), Quantum Well (QW), Gain Compression, α-Factor, Chirping, Differential Gain.
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  • Y. Arakawa and A. Yariv, “Quantum Well Lasers-Gain, Spectra, Dynamics”, Journal of Quantum Electronics, Vol. 22, No. 9, pp. 12-16, 1986.

  • F. Girardin, G.H. Daun, C. Chabran, P. Gallion, M. Blez and M. Allovon, “Determination of Non Linear Gain Coefficient of Semiconductor Lasers from above Threshold Spontaneous Emission Measurement”, IEEE Photonics Technology Letters, Vol. 6, No. 8, pp. 894-896, 1994.

  • J. Yao, P. Gallion, W. Elsasser and G. Debarge, “Nonlinear Gain and its Influence on the Dynamics in Single Quantum Well Lasers Operating at the First and Second Quantized State”, IEEE Photonics Technology Letters, Vol. 4, No. 11, pp. 1210-1212, 1992.

  • A. Tomita and A. Suzuki, “Carrier induced Lasing Wavelength Shift for Quantum well Laser Diodes”, IEEE Journal of Quantum Electronics, Vol. 23, No. 7, pp. 1155-1159, 1987.

  • A. Hamgauer and G. Wysocki, “Gain Compression and Linewidth Enhancement Factor in Mid-IR Quantum Cascade Lasers”, IEEE Journal of Quantum Electronics, Vol. 21, No. 6, pp. 1200-1211, 2015.

  • A. Yousuf and H. Najeeb, “Effect of Gain Compression above and below Threshold on the Chirp Characteristics of 1.55μm DFB Laser”, Optical Review, Vol. 23, No. 4, pp. 897-906, 2016.

  • D.J. Channin, “Effect of Gain Saturation on Injection Laser Switching”, Journal of Applied Physics, Vol. 50, pp. 3858-3860, 1979.

  • G.P. Agrawal, “Effect of Gain and Index Non-Linearities on Single Mode Dynamics in Semiconductor Lasers”, IEEE Journal of Quantum Electronics, Vol. 26, No. 11, pp. 1901-1909, 1990.

  • N. Ogasawara and R. Ito, “Longitudinal Mode Competition and Asymmetric Gain Saturation in Semiconductor Injection Lasers”, Japanese Journal of Applied Physics, Vol. 27, No. 4, pp. 607-614, 1988.

  • G. Wang, R. Nagarajan, D. Tauber and J. Bowers, “Reduction of Damping in High Speed Semiconductor Lasers”, IEEE Photonics Technology Letters, Vol. 5, No. 6, pp. 642-645, 1993.

  • H. Su, L. Zhang, A. L. Gray, R. Wang, P. M. Varangis and L. Lestera, “Gain Compression Coefficient and Above-Threshold Linewidth Enhancement Factor in InAs/GaAs Quantum DFB Lasers”, Proceedings of International Conference on Physics and Simulation of Optoelectronic Devices, pp. 5722-5726, 2005.

  • John C. Cartledge and R.C. Srinivasan, “Extraction of DFB Laser Rate Equation Parameters for System Simulation Purposes,” Journal of Light wave Technology, Vol. 15, No. 5, pp. 852-860, 1997.

  • M. Mittelstein, Y. Arakawa, A. Larsson and A. Yariv, “Second Quantized State Lasing of a Current Pumped Single Quantum Well Laser”, Applied Physics Letters, Vol. 49, pp. 1689-1691, 1986.


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  • Chirp Reduction in a Single Mode DM-SQW-DFB Laser Operated at Second Quantization State

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Authors

Abida Yousuf
Department of Electronics and Communication Engineering, National Institute of Technology, Srinagar, India
Hakim Najeeb-Ud-Din
Department of Electronics and Communication Engineering, National Institute of Technology, Srinagar, India

Abstract


We have observed the reduction in the chirp parameters (gain compression and above threshold α-factor) by operating the single quantum well laser at second quantization state. In this study, the carrier density at threshold is clamped by increasing the total cavity loss, so that the second energy level is populated leading to operation at second quantization state. We have identified wavelength shift towards the shorter wavelength side of the spectrum. Implies higher differential gain of the lasing mode, consequently decreases the effect of chirping in a directly modulated single QW laser.

Keywords


Directly Modulated (DM), Quantum Well (QW), Gain Compression, α-Factor, Chirping, Differential Gain.

References