Abstract

The laser materials in this investigation were based on methacrylate-modified silica (OR-MOSIL) gels doped with rhodamine 6G (R6G) Perchlorate or rhodamine B (RB) chloride. Synthesis of these materials was detailed previously.1 Dye concentrations varied from 10−4 to 10−5 molar. The materials were used in slab configurations, with typical dimensions of 15 ×5 × 0.76 mm. The ORMOSIL slabs were cut to shape and their ends polished using standard polishing procedures. Slabs were pumped transversely at 532 nm with a Q-switched Nd:YAG laser having 12-ns (70 ps seeded) pulsewidth and variable repetition rate from 1 to 30 Hz. The laser beam was focused to a line at the slab surface, using a 50-mm FL cylinder lens. Slab-laser output was collected by a positive lens and focused onto a silicon energy detector. An edge filter was used to eliminate background light from the pump beam. Because there were no tuning elements in the resonator, the lasers exhibited a broadband emission spectrum. Spectral outputs for the two dyes are shown in Fig. 1.

© 1991 Optical Society of America

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References

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