Solid state pulsed laser with a fiber-based resonator meets requirements for laser lithotripsy

P. P. Pashinin

doi:10.1117/12.142846

15 April 1993 Solid state pulsed laser with a fiber-based resonator meets requirements for laser lithotripsy

P. P. Pashinin

Proceedings Volume 1780, Lens and Optical Systems Design; 17801E (1993) https://doi.org/10.1117/12.142846
Event: Optical Systems Design '92, 1992, Berlin, Germany

Abstract

A number or applications (lithotripsy is among them) require a laser source with a variable pulse width in the range i'rom several hundreds nanoseconds to rew microseconds. Conventional technique al— lowing to generate Q-switched pulses or large duration is based upon introduction or negative loop in the oscillator scheme. This technique employs rast electronics which restrict reliability o the laser sys— tern and makes it rather complicated. Another approach to a solution or this problem includes scaling the resonator length o a Q—swltched oscillator. Large length or the resonator cavity in a compact conriguration can be obtained on a basis or either a oided resonator [1,2J or optical riber placed between one or the mirror and a laser rod 13 1 . To our knowledge [3 1 is the only paper in which a Nd:YAG rree-running operation with a riber - based resonator was described. Lack or works dealing with this approach is explained by a wide-spread opinion about parasitic nonlinear errects occurring in the riber. Indeed the nonlinear ertects (especially Sti— mulated BriIlouin Scattering) can result in pulse structure distortion and even in the damage or the riber. However update no investigations have been made revealing conditions which allow to generate stable pulses in Q-switch operation with optical riber in resonator. In experiment we investigated several laser schemes with a riber based resonator cavity.

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P. P. Pashinin "Solid state pulsed laser with a fiber-based resonator meets requirements for laser lithotripsy", Proc. SPIE 1780, Lens and Optical Systems Design, 17801E (15 April 1993); https://doi.org/10.1117/12.142846

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KEYWORDS

Resonators

Mirrors

Q switching

Pulsed laser operation

Laser resonators

Laser lithotripsy

Laser therapeutics

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