Abstract

A new, simple scheme to tune a double-pass, superradiant dye laser is reported. A planar cell with a thickness below 100 μm filled with a highly concentrated (4–5 × 10⁻³-M/liter) solution of Rhodamine 6G in ethanol is used. An unsaturated gain value of 1.7 cm⁻¹ has been measured with flashlamp pumping, and the amplifier has been found to operate at a well saturated regime. Smooth laser linewidths ranging from broadband, gain narrowed values of 10 nm to narrowband values of 8 GHz have been achieved by using appropriate frequency dispersive feedback elements and suitable cell thickness. A 5-GHz output has been observed with a 25-μm gap cell. The absence of a resonant cavity avoids modal structure and ensures improved frequency and intensity stability. The reported configuration should be scalable up as far as output energy is concerned. Simultaneous two-wavelength operation is possible. Pumping with a frequency-doubled Nd-laser should allow a further reduction of the usable cell thickness with narrower output bandwidths.

© 1976 Optical Society of America

Two-wavelength operation of a double-pass planar dye laser amplifier

P. Burlamacchi, R. Coisson, R. Pratesi, and D. Pucci
Appl. Opt. 16(6) 1553-1556 (1977)

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Narrow bandwidth dye laser suitable for pumping by a short pulse duration N₂ laser

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Wavelength shifts in tuning dye lasers

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Intracavity dye laser spectroscopy as a gain probing technique

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