Laser diode in a coherent resolved interferometer

Dongsong Sun; Shigang Liu; Yuan Zhao; Lijie Qiao

doi:10.1117/12.251911

24 September 1996 Laser diode in a coherent resolved interferometer

Dongsong Sun, Shigang Liu, Yuan Zhao, Lijie Qiao

Proceedings Volume 2886, Semiconductor Lasers II; (1996) https://doi.org/10.1117/12.251911
Event: Photonics China '96, 1996, Beijing, China

Abstract

A short coherence length of a laser diode (LD) is required in coherent resolved interferometers. The coherence length of a LD can be reduced by modulating the source with a high frequency signal, which is superposed on the driving current for the LD. A 980nm laser diode in this paper is modulated with a frequency 40MHz and modulation depth 0.5, where its coherence length is compressed 20 times. The first side-band peak in the coherence function is reduced by 10dB, but it is hard to suppress them completely.

Citation Download Citation

Dongsong Sun, Shigang Liu, Yuan Zhao, and Lijie Qiao "Laser diode in a coherent resolved interferometer", Proc. SPIE 2886, Semiconductor Lasers II, (24 September 1996); https://doi.org/10.1117/12.251911

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