Stimulated raman laser of amplifier using axicon pumping

Details Stimulated raman laser of amplifier using axicon pumping Stimulated raman laser of amplifier using axicon pumping

1993-04-06

1994-03-08

Scott, Jr., Leon

Coherent light generators

Raman laser

372 98, 372 93, 372103, H01S 330

Patent

active

052933954

ABSTRACT:
A raman cell oscillator/amplifier arrangement comprising a cell containing a raman high pressure gas or liquid medium with an axicon being located at each end of the cell, one axicon having an input window for a laser pump beam and the axicon at the cell's other end having an output coupler for the raman process converted beam. The axicons directs the laser pump beam towards an extended line focus along the axis of the cell at a shallow angle, the extended line focus for each axicon being collinear with each other to produce an extended raman gain region. By suitable design, it can be ensured that the pump beam energy density at focus is lower than either an optical breakdown or Brillouin backscatter threshold. This provides a means of efficiently producing a raman laser or amplifier having an extended raman gain region without developing problems of optical breakdown, Brillouin backscattering or self-focusing in the case of a liquid raman media.

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