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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 17 — Sep. 1, 2014
  • pp: 5138–5141

Tunable 975  nm nanosecond diode-laser-based master-oscillator power-amplifier system with 16.3  W peak power and narrow spectral linewidth below 10  pm

Thi Nghiem Vu, Andreas Klehr, Bernd Sumpf, Hans Wenzel, Götz Erbert, and Günther Tränkle  »View Author Affiliations

Optics Letters, Vol. 39, Issue 17, pp. 5138-5141 (2014)

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A spectrally tunable, narrow linewidth master oscillator power amplifier system emitting ns pulses with high peak power is presented. The master oscillator is a distributed feedback ridge waveguide (DFB-RW) laser, which is operated in continuous wave (CW) mode and emits at about 975 nm with a spectral line width below 10 pm. The oscillator can be tuned over a range of 0.9 nm by varying the injection current. The tapered amplifier (TA) consists of an RW section and a flared gain-guided section. The RW section of the amplifier acts as an optical gate and converts the CW input beam emitted by the DFB-RW laser into a train of short optical pulses, which are subsequently amplified by the tapered section. The width of the pulses is 8 ns at a repetition rate of 25 kHz. The peak power is 16.3 W. The TA preserves the spectral properties of the emission of the DBR-RW laser. The amplified spontaneous emission is suppressed by about 40 dB.

© 2014 Optical Society of America

OCIS Codes
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.3600) Lasers and laser optics : Lasers, tunable
(140.5960) Lasers and laser optics : Semiconductor lasers
(140.3538) Lasers and laser optics : Lasers, pulsed

ToC Category:
Lasers and Laser Optics

Original Manuscript: June 3, 2014
Manuscript Accepted: July 1, 2014
Published: August 25, 2014

Thi Nghiem Vu, Andreas Klehr, Bernd Sumpf, Hans Wenzel, Götz Erbert, and Günther Tränkle, "Tunable 975  nm nanosecond diode-laser-based master-oscillator power-amplifier system with 16.3  W peak power and narrow spectral linewidth below 10  pm," Opt. Lett. 39, 5138-5141 (2014)

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