Visible light weak-feedback grating external-cavity tunable semiconductor laser

Fuyun Lu; Shuzhong Yuan; Yujie Liu; Zhenxing Wei

doi:10.1117/12.319616

19 August 1998 Visible light weak-feedback grating external-cavity tunable semiconductor laser

Fuyun Lu, Shuzhong Yuan, Yujie Liu, Zhenxing Wei

Proceedings Volume 3547, Semiconductor Lasers III; (1998) https://doi.org/10.1117/12.319616
Event: Photonics China '98, 1998, Beijing, China

Abstract

A new method of using a weak-feedback grating external cavity to improve the output characteristics of visible light semiconductor laser was studied and proved to be practical. The experiment has been conducted to apply this method on 650 nm semiconductor laser. A blazed grating is used as the external cavity mirror to narrow the linewidth and select frequency. Through turning the grating, we obtained laser output with single longitudinal mode and linewidth as narrow as 0.1 pm, of which the linewidth reduction rate is 9800. The tuning range of wavelength is about 5 nm out of 20 nm fluorescent spectrum, and the side mode suppression ratio is ideal. Confocal Fabry-Perot interferometer and spectroscopy were used to measure the linewidth and frequencies. Proposals to improve the experimental results are raised.

Citation Download Citation

Fuyun Lu, Shuzhong Yuan, Yujie Liu, and Zhenxing Wei "Visible light weak-feedback grating external-cavity tunable semiconductor laser", Proc. SPIE 3547, Semiconductor Lasers III, (19 August 1998); https://doi.org/10.1117/12.319616

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