Single-longitudinal-mode solid laser
AssigneeFuji Photo Film Co., Ltd.
InventorsHiroaki Hyuga, Yoji Okazaki
Life of this patent
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Abstract
A solid laser produces a laser beam of a 1 μm wavelength band with an Nd-doped solid laser medium. An oscillation mode is brought to a single longitudinal mode with a Fabry-Pérot etalon located within a resonator. An etalon thickness, an etalon reflectivity, an etalon inclination, and a resonator longitudinal mode interval satisfy the relationships, 1.2%≦RN≦15% and 0.5°≦θ≦2.0°, in which RN represents an effective reflectivity of the etalon with respect to wavelengths λ=λ0±Δλc deviating by a resonator longitudinal mode interval Δλc from a resonance wavelength λ0 of the etalon, and θ represents an inclination of an etalon optical axis with respect to a resonator optical axis.
Claims2
A single-longitudinal-mode solid laser capable of producing a laser beam having a wavelength of a band ranging from 1 μm to 1.1 μm, the solid laser comprising:
- i) a solid laser medium doped with neodymium,
- ii) a resonator, and
- iii) a Fabry-Pérot type of etalon, which is located within the resonator and brings an oscillation mode to a single longitudinal mode,
- wherein a thickness of the etalon, a reflectivity of the etalon, an inclination of the etalon, and a resonator longitudinal mode interval are adjusted so as to satisfy the relationships represented by the formulas:
- 1.2%≦RN≦15% and 0.5°≦θ≦2.0°
- in which RN represents an effective reflectivity of the etalon with respect to wavelengths λ=λ0±Δλc deviating by a resonator longitudinal mode interval Δλc from a resonance wavelength λ0 of the etalon, and θ represents an inclination of an optical axis of the etalon with respect to an optical axis of the resonator.
Dependencies are inferred from the claim text.