Development of a narrow-band, tunable, frequency-quadrupled diode laser for UV absorption spectroscopy

摘要

A compact, lightweight, low-power-consumption source of tunable, narrow-bandwidth blue and UV radiation is described. In this source, a single-longitudinal-mode diode laser seeds a pulsed,GaAlAs tapered amplifier whose～860-nm output is frequency quadrupled by two stages of single-pass doubling. Performance of the laser system is characterized over a wide range of amplifier d (0.1-1.0), pulse durations (50 ns-l.0 μs), peak currents (≤14 A), and average currents (≤2.0 capabilities and limitations of this source are discussed. We recorded high-resolution, Doppler-limited absorption spectra of nitric oxide and sulfur dioxide near 215 nm; the SO↓(2) spectrum was found to have significantly more structure and higher peak absorption cross sections than previously reported.#1998 Optical Society of America OCIS codes: 140.0140,140.3600,140.3610,140.5960,190.2620,300.1030.