Dye cell in Shank Type Geometry was excited by multiple sets of 2nd harmonic of a laboratory built cavity dumped Nd:YAG laser to induce multiple dynamic gratings at the same spatial location in dye cell. The result of their concurrent operation are presented in this paper. It will be shown that when the delay between the three sets of excitation beams is varied within coherence length of the pump laser, the number of dynamic volume gratings and hence and colors of multiple oscillating lines become tunable. Five lines were observed from two pairs of excitation beams and maximum nine lines for three pairs of beams. The colors of these 9 spectral lines varied from green to pink and were equally spaced in their spectrum. This experimental study was conduced precisely as a function of optical path differences between three sets of excitation beams varying from 1 to 9 mm among three sets of pump beams. The effect of coherence length and state of polarization of excitation laser on emission of multiple lines were investigated. No external gratings were used to excite the gain medium. The objective of this experimental study was to produce multiple laser sources of different colors to interface it to optical integrated circuits for use in image processing, optical interconnections and photonic switching.

Date Published: 23 June 1999
PDF: 5 pages
Proc. SPIE 3609, Optical Pulse and Beam Propagation, (23 June 1999); doi: 10.1117/12.351060

Published in SPIE Proceedings Vol. 3609:
Optical Pulse and Beam Propagation
Yehuda B. Band, Editor(s)