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Tunable dual-wavelength-switching fiber grating laser

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4 Author(s)
Xu, Y.Z. ; Dept. of Electr. Eng., Hong Kong Polytech., Kowloon, Hong Kong ; Tam, H.Y. ; Du, W.C. ; Demokan, M.S.

We report a tunable dual-wavelength-switching fiber grating laser by exploiting the large homogeneous gain broadening in erbium (Er)-doped fiber to suppress simultaneous lasing. Wavelength switching was accomplished through a novel design which has two overlapping cavities sharing a single-gain medium. The loss corresponding to one of the lasing wavelengths can be modulated via an optical chopper. Output power of about 6 mW and extinction ratio up to 50 dB were observed. The lasing wavelengths were tunable and switching was demonstrated for wavelength separations ranging from 0.35 to 23.5 nm.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 3 )