Highly-Sensitive Sonogram for Assessment of Chirp in Semiconductor Mode-Locked Lasers
| Autor: | P. Stolarz, Michael J. Strain, Gabor Mezosi, A.C. Bryce, Marc Sorel |
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| Rok vydání: | 2012 |
| Předmět: |
Waveguide (electromagnetism)
Materials science business.industry Detector Biasing Condensed Matter Physics Laser Two-photon absorption Atomic and Molecular Physics and Optics Semiconductor laser theory law.invention Optics law Chirp Optoelectronics Electrical and Electronic Engineering business Group delay and phase delay |
| Zdroj: | IEEE Journal of Quantum Electronics. 48:995-1003 |
| ISSN: | 1558-1713 0018-9197 |
| Popis: | We report on the detailed characterization of ultrashort pulses emitted from a 1.5- AlGaInAs/InP semiconductor passively mode-locked laser, operating at a repetition frequency of 35 GHz. Both the temporal and phase profiles of the pulses are retrieved using a sonogram technique that utilizes a highly-sensitive two-photon absorption waveguide detector. The system enables full characterization of pulses with energy as low as 10 fJ and peak power level of 5 mW, which is only inaccessible by a limited number of high-sensitivity measurement approaches. We show that the pulses exhibit a prevailing positive linear chirp across a wide range of biasing conditions. Its high sensitivity to the gain section current proves the dominant contribution of the gain conditions to the group delay characteristics of the emitted pulses. |
| Databáze: | OpenAIRE |
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