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Measurement of gain spectrum for Fabry-Perot semiconductor lasers by the Fourier transform method with a deconvolution process

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4 Author(s)
Wei-Hua Guo ; State Key Lab. on Integrated Optoelectronics, Chinese Acad. of Sci., Beijing, China ; Yong-Zhen Huang ; Chun-Lin Han ; Li-Juan Yu

To improve the accuracy of measured gain spectra, which is usually limited by the resolution of the optical spectrum analyzer (OSA), a deconvolution process based on the measured spectrum of a narrow linewidth semiconductor laser is applied in the Fourier transform method. The numerical simulation shows that practical gain spectra can be resumed by the Fourier transform method with the deconvolution process. Taking the OSA resolution to be 0.06, 0.1, and 0.2 nm, the gain-reflectivity product spectra with the difference of about 2% are obtained for a 1550-nm semiconductor laser with the cavity length of 720 μm. The spectra obtained by the Fourier transform method without the deconvolution process and the Hakki-Paoli method are presented and compared. The simulation also shows that the Fourier transform method has less sensitivity to noise than the Hakki-Paoli method.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:39 ,  Issue: 6 )

Date of Publication:

June 2003

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