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21 April 2017 First pulse effect self-suppression picosecond regenerative amplifier (Conference Presentation)
Haitao Fan, Liang Chang, Yi Zhang, Siyi Yao, Wei Lu, Xiaohong Yang
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Proceedings Volume 10082, Solid State Lasers XXVI: Technology and Devices; 100820P (2017) https://doi.org/10.1117/12.2246999
Event: SPIE LASE, 2017, San Francisco, California, United States
Abstract
First pulse effect, commonly seen in nanosecond cavity-dumped lasers and picosecond regenerative amplifiers, not only leads to degradation of processing quality, but also acts as potential threat to optical switching elements. Several methods have been developed to suppress that effect, including electronic controls, polarization controls, and diffraction controls. We present a new way for first pulse self-suppression without any additional components. By carefully arranging the cavity mirror of a regenerative amplifier, we realized ‘parasitic lasing like’ radiation. When the regenerative amplifier works in ‘operation ready’ status, the parasitic lasing occurs and prevents the gain crystal from saturation. When the regenerative amplifier starts working and amplifying pulses, the first pulse in a pulse train will not get much more gain and energy than pulses following it. As parasitic lasing disappears at the same time, the average output power of the amplifier does not significantly reduce. This cost effective method does not require any additional component. In addition, as it is not polarization dependent, this method is widely suitable for different kinds of regenerative amplifiers. It’s the easiest and cheapest way to suppress first pulse effect, to the best of our knowledge.
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Haitao Fan, Liang Chang, Yi Zhang, Siyi Yao, Wei Lu, and Xiaohong Yang "First pulse effect self-suppression picosecond regenerative amplifier (Conference Presentation)", Proc. SPIE 10082, Solid State Lasers XXVI: Technology and Devices, 100820P (21 April 2017); https://doi.org/10.1117/12.2246999
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KEYWORDS
Optical amplifiers
Picosecond phenomena
Control systems
Polarization control
Diffraction
Laser applications
Laser processing
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