Zhang Guiyan

High-repetition tunable picosecond dye laser pumped by a copper bromide laser

It is reported that by mixing the saturable absorber DODCI with the gain medium Rh6G, 30-ps pulses can be generated from a short-cavity dye laser pumped by a copper bromide laser with a 25-ns pulsewidth and a 10-kHz repetition rate. A theoretical analysis of pulse shortening by this method is shown to agree with experimental results. A dispersion-amplifier system was employed for synchronous amplification and frequency tuning of the dye laser. The single-pulse energy was up to 0.15 mu J with a linewidth-of 1.0 cm/sup -1/ in a one-stage amplifier, and the amplified spontaneous emission (ASE) background noise was reduced to below 10%. By simply rotating the grating and occasionally adjusting the thickness of the dye cavity slightly, the laser can be tuned continuously from 570 to 590 nm with a nearly Fourier-transform-limited linewidth. The repetition rate can be varied from 10 to 20 kHz. >

Applications of the CuBr vapor laser as an image-brightness amplifier in high-speed photography and photomicrography

A CuBr vapor laser with an output power of ~1 W has been used as a brightness amplifier, for the first time to our knowledge, in high-speed photography and photomicrography.

New anomalous pulse optogalvanic signals

We report here some new anomalous pulse optogalvanic signals arising from transitions between different levels of metal atoms and suggest a possible mechanism to explain this phenomenon.

Generation of 30ps pulse from a short cavity dye laser pumped by a copper bromide laser

The transient phenomena of output from a short cavity dye laser (SCDL) pumped by a copper bromide laser are investigated. For the first time a 30ps dye laser pulse was generated, using the SCDL with Rh6G and DODCI dissolved in ethanol.

Amplification of tunable high repetition picosecond pulse from short cavity dye lasers

It is reported here that synchronous amplification and tuning of 30ps pulses from the short cavity dye laser pumped by copper bromide laser have been achieved by a dye amplifier-dispersion system. It can be tuned continuously from 570 to 590nm to be almost Fourier-transform limited when using Rh6G solution.