Line narrowing in a diode laser by external optical feedback

Authors

Raymund Sarmiento ⋅ PH Department of Physics, University of San Carlos
John Waruel F. Liwag ⋅ PH Department of Physics, University of San Carlos
Roland Emerito S. Otadoy ⋅ PH Department of Physics, University of San Carlos
Kees Karremans ⋅ NL Vrije Universiteit Amsterdam, The Netherlands and University of San Carlos, Philippines

Abstract

We have investigated the effect of optical feedback in a diode laser. We found that even for a small amount of feedback, a change in the output power can be detected. It is also observed that the threshold current was slightly reduced due to feedback as expected from the theoretical model. Looking at the frequency domain, using a Fabry-Perot etalon, the effects of feedback are more pronounced. In contrast to other groups who observed a decrease in stability of the laser with optical feedback, we were able to increase the stability of the system, resulting in a linewidth narrowing of 25%.

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Issue

2002: Proceedings of the 20th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2002-PP-36

Section

Instrumentation and Optics

Published

2002-10-23

How to Cite

[1]

R Sarmiento, JWF Liwag, RES Otadoy, and K Karremans, Line narrowing in a diode laser by external optical feedback, Proceedings of the Samahang Pisika ng Pilipinas 20, SPP-2002-PP-36 (2002). URL: https://proceedings.spp-online.org/article/view/SPP-2002-PP-36.