| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A 46-W Laser Diode Stack End-Pumped Slab Amplifier with a Pulse Duration of Picoseconds |
| YAN Ying1,2**, FAN Zhong-Wei1, NIU Gang2, YU Jin1, ZHANG Heng-Li3 |
1Academy of Opto-electronics, Chinese Academy of Sciences, Beijing 100094
2Beijing GK Laser Technology Co., Ltd., Beijing 100092
3School of Optoelectronics, Beijing Institute of Technology, Beijing 100081
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| Cite this article: |
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ZHANG Heng-Li, YU Jin, YAN Ying et al 2012 Chin. Phys. Lett. 29 034204 |
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Abstract A 46-W laser diode end-pumped amplifier is demonstrated by using a SESAM passively mode-locked oscillator and a compact LD stack end-pumped slab amplifier. For the oscillator, a 5-W picosecond mode-locked laser with a repetition frequency of 79 MHz is obtained with beam quality factors of M2<1.3. A beam shaping system made up of cylindrical lens is designed according to different sizes of the active medium in both directions, and a plane−plane cavity is used in the amplifier for high efficiency. At the absorbed pumping power of 174 W, the highest output power of 46 W is obtained with the slope efficiency of 29.5%. The beam quality factors M2 in both directions are measured to be 1.43 and 1.76, respectively.
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| Keywords:
42.55.Xi
42.60.Pk
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Received: 25 October 2011
Published: 11 March 2012
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