| Original Articles |
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Enhancing Coherent Combining Efficiency via Choosing Appropriate Lasing Wavelength in a Michelson Compound Cavity Based on Two 3dB Fibre Loop Mirrors and One Fibre Bragg Grating |
LIU Feng-Nian;JIA Xiu-Jie;LIU Yan-Ge;YUAN Shu-Zhong;DONG Xiao-Yi |
| Key Laboratory of Opto-Electronic Information and Technology (Ministry of Education), Institute of Modern Optics, Nankai University, Tianjin 300071 |
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| Cite this article: |
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LIU Feng-Nian, JIA Xiu-Jie, LIU Yan-Ge et al 2007 Chin. Phys. Lett. 24 929-932 |
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Abstract Enhancing coherent combining efficiency via choosing appropriate lasing wavelength in a Michelson compound cavity based on two 3dB fibre loop mirrors and one fibre Bragg grating (FBG) has been experimentally demonstrated. The FBG with 4.5% reflectivity is replaced at the cleaved facet with 4% Fresnel reflection. A high coherent combining efficiency of 93.5% is obtained when the FBG with central wavelength at 1559.845nm is introduced into the cavity, while it is only 90.1% combining efficiency with the FBG at central wavelength 1557.830nm. In comparison with other reports, the proposed compound-cavity laser has the advantage of needless tuning FBG to obtain the coherent condition, and it is facile to ascertain the seemly
wavelength lasing for a Michelson compound cavity.
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| Keywords:
42.25.Hz
42.55.Wd
42.60.Da
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Received: 24 October 2006
Published: 26 March 2007
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