Efficient Arc Lamps for Optical Pumping of Neodymium Lasers

S. Yoshikawa; K. Iwamoto; K. Washio

doi:10.1364/AO.10.001620

Applied Optics
Vol. 10,
Issue 7,
pp. 1620-1623
(1971)
•https://doi.org/10.1364/AO.10.001620

Efficient Arc Lamps for Optical Pumping of Neodymium Lasers

S. Yoshikawa, K. Iwamoto, and K. Washio

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S. Yoshikawa, K. Iwamoto, and K. Washio, "Efficient Arc Lamps for Optical Pumping of Neodymium Lasers," Appl. Opt. 10, 1620-1623 (1971)

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Abstract

A krypton arc lamp with high conversion efficiency has been obtained by increasing Kr pressure. The conversion efficiency of a lamp at 8 atm is about 1.2–1.5 times as high as that of a lamp used at 2 atm, depending on the operating electrical input. The high pressure Kr arc lamp and Nd:YAG rod were set in a prolate ellipsoidal cavity. Laser power of 73 W was obtained at an input of 2.63 kW for a slope efficiency of 3.5%.

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Band	Emission from Kr Arc Lamp f(λ) (%)	YAG (1.9 mm^t, 0.98 wt.% Nd₂O₃)		Si–Glass (2.75 mm^t, 4 wt.% Nd₂O₃)
Band	Emission from Kr Arc Lamp f(λ) (%)	Effective Absorption Coefficient σ (mm⁻¹)	Absorption Efficiency σ* = f(λ) · σ (% mm⁻¹)	Effective Absorption Coefficient σ(mm⁻¹)	Absorption Efficiency σ*= f(λ) · σ (% mm⁻¹)
Total(+)	100.0	0.053	5.300	0.127	12.700
Y–1	3.3	0.017	0.056	0.073	0.241
Y–2	4.8	0.044	0.211	0.219	1.051
IR–1	11.0	0.122	1.342	0.135	1.485
IR–2	19.0	0.128	2.432	0.269	5.111
IR–3	11.3	0.013	0.147	0.139	1.571

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Applied Optics