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Investigation of External Optical Feedback Resistance of IC-DFB and GC-DFB Lasers Using a Very Simple Experimental Set-up |
| SUN Chang-Zheng1;XIONG Bing1;LUO Yi1;NAKANO Yoshiaki2 |
| 1State Key Lab on Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084
2Department of Electronic Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan |
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| Cite this article: |
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SUN Chang-Zheng, XIONG Bing, LUO Yi et al 2003 Chin. Phys. Lett. 20 1061-1063 |
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Abstract We study the external optical feedback resistance of both index-coupled (IC) and gain-coupled distributed feedback (DFB) lasers using a very simple experimental set-up. Though IC-DFB lasers with large coupling coefficients are found to be less sensitive to external reflection, they suffer from mode instability at high injection level. On the other hand, the introduction of gain-coupling mechanism can significantly improve both the immunity to external optical feedback and the single mode yield of the device.
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| Keywords:
42.55.Px
85.60.Bt
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Published: 01 July 2003
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| PACS: |
42.55.Px
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(Semiconductor lasers; laser diodes)
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85.60.Bt
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(Optoelectronic device characterization, design, and modeling)
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