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Laser diode structures with a saturable absorber for high-energy picosecond optical pulse generation by combined gain-and Q-switching
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Ryvkin et al gain switched with absorber as accepted
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Publication details
| Journal | Semiconductor science and technology |
|---|---|
| Date | Accepted/In press - 9 Nov 2016 |
| Date | Published (current) - 19 Jan 2017 |
| Issue number | 2 |
| Volume | 32 |
| Number of pages | 8 |
| Original language | English |
Abstract
The performance of gain-switched Fabry-Perot asymmetric-waveguide semiconductor lasers with a large equivalent spot size and an intracavity saturable absorber was investigated experimentally and theoretically. The laser with a short (∼20 μm) absorber emitted high-energy afterpulse-free optical pulses in a broad range of injection current pulse amplitudes; optical pulses with a peak power of about 35 W and a duration of about 80 ps at half maximum were achieved with a current pulse with an amplitude of just 8 A and a duration of 1.5 ns. Good quality pulsations were observed in a broad range of elevated temperatures. The introduction of a substantially longer absorber section leads to strong spectral broadening of the output without a significant improvement to pulse energy and peak power.
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© 2017 IOP Publishing Ltd . This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
- gain switching, optical radars, semiconductor lasers
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