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20 nm wavelength tunable single mode picosecond pulse generation at 1.3 mu m by self-seeded gain-switched semiconductor laser

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8 Author(s)
M. Schell ; Tech. Univ. Berlin, Germany ; D. Huhse ; A. G. Weber ; G. Fischbeck
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A back reflection of less than 0.25% of the monochromatised emitted power of a gain switched laser diode is shown to switch the laser from longitudinal multimode to singlemode pulsed operation. The pulse shape (FWHM=45 ps) is not affected by the feedback. A wavelength detuning of 20 nm with a sidemode suppression ratio better than 13 dB and a peak value of 22 dB were found from a simple experimental setup using a 9:1 fibre coupler and an external grating.

Published in:

Electronics Letters  (Volume:28 ,  Issue: 23 )