Planar waveguide and laser amplifier
AssigneeMitsubishi Electric Corporation
InventorsKenichi Hirosawa, Fumio Shohda, Shumpei Kameyama
Life of this patent
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Abstract
Included are: a first dielectric multilayer film (15) for transmitting a wavelength band including a wavelength of signal light (2) and reflecting first excitation light (4), the first dielectric multilayer film (15) being disposed on one of two end surfaces of a core (11), a first inner cladding (12), a first outer cladding (13), and a second outer cladding (14); and a second dielectric multilayer film (12) for transmitting a wavelength band including the wavelength of the signal light (2) and reflecting the first excitation light (4), the second dielectric multilayer film (12) being disposed on the other one of the two end surfaces.
Claims12
A planar waveguide comprising:
- a plate-like core to amplify signal light by absorbing first excitation light and forming a population inversion;
- a plate-like first inner cladding to emit the first excitation light by absorbing second excitation light and forming a population inversion and reflecting the signal light, the first inner cladding being attached to one of two planes of the core;
- a plate-like first outer cladding to reflect the first excitation light, the first outer cladding being attached to, of two planes of the first inner cladding, a plane opposite to a plane to which the core is attached;
- a plate-like second outer cladding to reflect each of the first excitation light and the signal light, the second outer cladding being attached to, of the two planes of the core, a plane opposite to the plane to which the first inner cladding is attached;
- a first dielectric multilayer film to transmit light in a wavelength band including a wavelength of the signal light and reflect the first excitation light, the first dielectric multilayer film being disposed on one of two end surfaces of the core, the first inner cladding, and the first and second outer claddings, and;
- a second dielectric multilayer film to transmit light in a wavelength band including the wavelength of the signal light and reflect the first excitation light, the second dielectric multilayer film being disposed on another one of the two end surfaces.
A laser amplifier comprising:
- a signal light source to emit signal light;
- a plate-like core to amplify the signal light emitted from the signal light source by absorbing first excitation light and forming a population inversion;
- a plate-like first inner cladding to emit the first excitation light by absorbing second excitation light and forming a population inversion and reflect the signal light, the first inner cladding being attached to one of two planes of the core;
- a plate-like first outer cladding to reflect the first excitation light, the first outer cladding being attached to, of two planes of the first inner cladding, a plane opposite to a plane to which the core is attached;
- a plate-like second outer cladding to reflect each of the first excitation light and the signal light, the second outer cladding being attached to, of the two planes of the core, a plane opposite to the plane to which the first inner cladding is attached;
- a first dielectric multilayer film to transmit light in a wavelength band including a wavelength of the signal light and reflect the first excitation light, the first dielectric multilayer film being disposed on one of two end surfaces of the core, the first inner cladding, and the first and second outer claddings, and;
- a second dielectric multilayer film to transmit light in a wavelength band including the wavelength of the signal light and reflect the first excitation light, the second dielectric multilayer film being disposed on another one of the two end surfaces.
Dependencies are inferred from the claim text.