V. V. Bocharov, A. Z. Grasyuk, I. G. Zubarev, A. V. Kotov, V. G. Smirnov, “Many-pulse infrared Raman laser”, Kvantovaya Elektronika, 1974, Volume 1, Number 10,Pages <nobr>2185

This article is cited in 4 papers

Many-pulse infrared Raman laser

V. V. Bocharov, A. Z. Grasyuk, I. G. Zubarev, A. V. Kotov, V. G. Smirnov

Abstract: An investigation was made of the main characteristics of a liquid-nitrogen Raman laser pumped longitudinally by a neodymium laser. Pumping lasting 200–600 μsec and it consisted of a series of ~30 pulses of 0.1–0.3 μsec duration each. This made it possible to increase considerably the pump energy compared with the case when only one pulse was used. A study was made of narrow-band excitation (in this case the pump spectrum Δν_p≈0.05 cm^–1 was narrower than the spontaneous Raman scattering line of liquid nitrogen Δν_l= 0.067 cm^–1) and of wide-band excitation (Δν_p = 80 cm^–1>> Δν_l). The Raman laser emitted a series of 30 pulses with a total energy up to 40 J. The average efficiency was ~15%. The output power exceeded 15 MW. The output beam diameter was ~1 cm and its divergence was (0.5–1.5)X10^–3 rad. A great proportion of the output energy was contained in the first Stokes component (λ_s = 1.41 μ).

UDC: 621.378.9:535.375

PACS: 42.55.Ye, 42.60.Jf, 42.60.Lh

Received: 30.04.1974