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US 4,903,271 AGranted
Laser apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKoji Yasui, Masaaki Tanaka, Shigenori Yagi, Masaki Kuzumoto, Yasuhito Myoi, Kazuki Kuba
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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKoji Yasui, Masaaki Tanaka, Shigenori Yagi, Masaki Kuzumoto, Yasuhito Myoi, Kazuki Kuba
Estimating the term…
A laser apparatus has a phase regulator for regulating phase of output laser beam is provided, in which a full reflection portion of an output mirror is made partially reflective and a relative optical length thereof to a non-reflection portion of the output mirror is regulated by a relative thickness thereof. In one aspect of the invention, a coating provided on a center portion of an inner surface of an output mirror of a resonator comprises a partially reflective coating and a phase difference between laser beam portions passing through the center portion and a surrounding portion is regulated by a thin membrane having same refraction index as that of a matrix of the output mirror and provided between the matrix and a coating on either surface of the output mirror.
A laser apparatus, comprising:
The laser apparatus as claimed in any of 1 or 3-4 inclusive wherein said laser medium is a gas medium.
The laser apparatus as claimed in any of 1 or 3-5 inclusive wherein said laser medium is a solid state laser element.
The laser apparatus as claimed in any of 1,3-5,8 or 9 inclusive, wherein said resonator is of an unstable resonator.
The laser apparatus as claimed in any of 1,3-5,8 inclusive wherein said resonator is a stable resonator.
The laser apparatus as claimed in any of 1,3-5, or 12, inclusive further comprising an auxiliary light source for additionally exciting a portion of said solid state laser element along an optical axis thereof.
The laser apparatus as claimed in any of 1,3-5, or 12 inclusive wherein said fully reflective mirror is a concaved collimating mirror.
Dependencies are inferred from the claim text.