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Influence of Nonlinear Gain Saturation on the Time-Bandwidth Product of Optical Pulse from a Gain-Switched Semiconductor Laser |
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| Authors: | Kenji Wada Tetsuya Matsuyama Hiromichi Horinaka Yoshio CHO |
| Affiliation: | (1) Faculty of Engineering, Osaka Prefecture University, Department of Physics and Electronics, Gakuen-cho 1-1, Sakai, Osaka 599-8531, Japan;(2) Oyokoden Applied Photonics Lab Co., Ltd., 5301, Haga, Okayama, Okayama 701-1296, Japan |
| Abstract: | It is found numerically that the time-bandwidth product (TBP) of optical pulse from a gain-switched semiconductor laser operating under a sufficient gain saturation condition increases monotonously with increasing modulation amplitude. This enhancement of the TBP becomes remarkable for longer-wavelength semiconductor lasers (1.3, 1.55 μm) having large value of the gain compression factor ε (∼ 10−23 m3), making the pulse chirp estimation using the TBP difficult. |
| Keywords: | semiconductor laser gain saturation time-bandwidth product pulse chirp estimation gain-switching |
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