Sumitomo Electric Industries, Limited

Genesia Corporation

Yuji Ikeda

Michiko Takushima

Tomomi Sano

Norihide Takeyama

Yoshikazu Kanai

The present invention relates to an optical device having a structure that can make the diameter of the emitted Gaussian beam smaller. The optical device is arranged between a first and second positions, and comprises a first and second optical systems separated with a focus on an intermediate position between the first and second positions. The first optical system, arranged between the first and intermediate positions, comprises a first light entrance surface on which a Gaussian beam having a beam waist, whose radius becomes wat the first position, is incident, and a first light emission surface from which a Gaussian beam having a beam waist, whose radius becomes wat the intermediate position, is emitted. The second optical system, arranged between the intermediate and second positions, comprises a second light entrance surface on which the Gaussian beam emitted from the first optical system is incident, and a second light emission surface from which a Gaussian beam having a beam waist, whose radius becomes wat the second position, is emitted. The radial ratio of the beam waists (w/w) is set so as to become smaller than a geometrical-optical lateral magnification of the optical device.

Optical system, optical device including the same, and optical device designing method

In an incoming path, light fed to an input port is demultiplexed by a wavelength demultiplexer in terms of wavelength, converged by a first light-converging optical system, reflected by a first reflecting mirror, turned into parallel light by the first light-converging optical system, and multiplexed by the wavelength demultiplexer, so as to be fed to a reflecting surface of a rectangular reflecting mirror. In an outgoing path, the light reflected by the rectangular reflecting mirror is demultiplexed by the wavelength demultiplexer in terms of wavelengths, converged by the first light-converging optical system, reflected by the first reflecting mirror, turned into parallel light by the first light-converging optical system, and multiplexed by the wavelength demultiplexer, so as to be fed to an output port. An image of each wavelength light component reflected by the first reflecting mirror is inverted between the incoming and outgoing paths.

Growing community of inventors

Mitaka, Japan

Yuji Ikeda