OPO CARS: coherent anti-Stokes Raman spectroscopy using tunable optical parametric oscillators injection-seeded by external-cavity diode lasers
✍ Scribed by G.W. Baxter; M.J. Johnson; J.G. Haub; B.J. Orr
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 617 KB
- Volume
- 251
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Coherent anti-Stokes Raman spectroscopy (CARS) is performed on nitrogen gas using the signal wave from a pulsed 13-barium borate optical parametric oscillator (OPO), which has a passive ring cavity and is injection-seeded!at its idler wavelength by a single-mode, external-cavity diode laser. The observed CARS linewidths are consistent with an optical bandwidth of 0.01 cm-~ for the continuously tunable OPO signal radiation. Moreover, injection seeding with two diode l lasers generates two-line rovibrational CARS spectra giving thermometric information on a single-shot basis. The utility of these OPO CARS methods for combustion diagnostics is indicated.