Fiber-coupled microsphere Raman laser
First Claim
1. A Raman Laser comprising:
- a waveguide, the waveguide having a transverse optical coupling region positioned between a first portion and a second portion of the waveguide;
a dielectric micro-resonator, the micro-resonator and the waveguide being substantially optically phase matched; and
a laser pump, the output of the laser pump being optically connected to the first portion of the waveguide;
the waveguide and the micro-resonator being arranged so as to permit the output of the laser pump to excite stimulated Raman emissions in the micro-resonator such that laser output power is optically coupled to the waveguide through the transverse optical coupling region of the waveguide.
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Abstract
The present invention is a Raman laser and methods related thereto. In the preferred embodiments, the Raman laser comprises a laser pump signal in a fiber waveguide which is optically coupled to a micro-resonator through a fiber taper. The micro-resonator is constructed from a material that has a high Q when it is formed into a micro-resonator and is phase matched to the waveguide. The lasing frequency can be determined based upon the pump input or the micro-resonator material. In the preferred embodiments, the micro-resonator is constructed from a fused silica material. The present invention provides a compact laser with improved emissions and coupling efficiencies and the ability to use stimulated Raman scattering effects to create lasers having frequencies that are otherwise difficult to obtain. Alternative configurations include multiple micro-resonators on a single fiber waveguide and/or utilizing multiple waveguides attached to one or more micro-resonators. The Raman laser can be made to operate in a continuous-wave as opposed to self-pulsing mode.
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Citations
39 Claims
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1. A Raman Laser comprising:
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a waveguide, the waveguide having a transverse optical coupling region positioned between a first portion and a second portion of the waveguide;
a dielectric micro-resonator, the micro-resonator and the waveguide being substantially optically phase matched; and
a laser pump, the output of the laser pump being optically connected to the first portion of the waveguide;
the waveguide and the micro-resonator being arranged so as to permit the output of the laser pump to excite stimulated Raman emissions in the micro-resonator such that laser output power is optically coupled to the waveguide through the transverse optical coupling region of the waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of producing stimulated Raman scattering emissions for a Raman laser, comprising:
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providing a dielectric micro-resonator, a waveguide, and a laser pump;
coupling the micro-resonator between a first section and a second section of a transverse optical coupling region of the waveguide, the micro-resonator and the waveguide being substantially optically phase matched;
launching a pump laser signal from the laser pump into the waveguide;
arranging the waveguide and the micro-resonator, thereby exciting stimulated Raman emissions in the micro-resonator, such that laser output power from the micro-resonator is optically coupled to the waveguide through the transverse optical coupling region of the waveguide. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A Raman Laser comprising:
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a fiber waveguide, the fiber waveguide having a transverse optical coupling region positioned between a first portion and a second portion of the fiber waveguide;
a spherical micro-resonator, the spherical micro-resonator and the fiber waveguide being substantially optically phase matched; and
a laser pump, an output of the laser pump being optically connected to the first portion of the fiber waveguide;
the fiber waveguide and the spherical micro-resonator being arranged to permit the output of the laser pump to excite Raman emissions in the spherical micro-resonator, the laser output power being optically coupled to the fiber waveguide through the transverse optical coupling region. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification