Systems and methods for cascaded raman lasing at high power levels
First Claim
1. A Raman lasing system, comprising:
- a pump laser and a cascaded Raman resonator,wherein the pump laser has a master oscillator power amplifier configuration, comprisingan oscillator for generating an oscillator output, andan amplifier for receiving the oscillator output as an input and generating therefrom an amplified output at a selected wavelength, andwherein the cascaded Raman resonator receives the amplified output as an input and generates therefrom an output having a selected target wavelength;
wherein the pump laser further comprises a wavelength-dependent loss element, connected between the oscillator and the amplifier, for preventing damage to the oscillator resulting from backward propagation of light from the amplifier and cascaded Raman resonator into the oscillator,whereby the power limit requirements for the wavelength-dependent loss element depend upon the power level of the oscillator output, and whereby the system is scalable to have amplifier and cascaded Raman resonator outputs with power levels exceeding the power limits of the wavelength-dependent loss element.
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Abstract
In a light amplification system, a fiber-based oscillator, amplifier, and cascaded Raman resonator are coupled together in series. The oscillator output is provided as an input into the amplifier, the amplifier output is provided as a pumping input into the cascaded Raman resonator, and the cascaded Raman resonator provides as an output single-mode radiation at a target wavelength. A loss element is connected between the oscillator and amplifier, whereby the oscillator is optically isolated from the amplifier and cascaded Raman resonator. A filter is coupled between the isolator and the amplifier for filtering out backward-propagating Stokes wavelengths generated in the cascaded Raman resonator. The oscillator is operable within a first power level range, and the amplifier and cascaded Raman resonator are operable within a second power level range exceeding the first power level range.
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Citations
21 Claims
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1. A Raman lasing system, comprising:
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a pump laser and a cascaded Raman resonator, wherein the pump laser has a master oscillator power amplifier configuration, comprising an oscillator for generating an oscillator output, and an amplifier for receiving the oscillator output as an input and generating therefrom an amplified output at a selected wavelength, and wherein the cascaded Raman resonator receives the amplified output as an input and generates therefrom an output having a selected target wavelength; wherein the pump laser further comprises a wavelength-dependent loss element, connected between the oscillator and the amplifier, for preventing damage to the oscillator resulting from backward propagation of light from the amplifier and cascaded Raman resonator into the oscillator, whereby the power limit requirements for the wavelength-dependent loss element depend upon the power level of the oscillator output, and whereby the system is scalable to have amplifier and cascaded Raman resonator outputs with power levels exceeding the power limits of the wavelength-dependent loss element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A Raman lasing method, comprising:
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(a) providing a pump laser and a cascaded Raman resonator, (b) configuring a pump laser to have a master oscillator power amplifier configuration, wherein the oscillator is configured to generate an oscillator output having a low power level, and wherein the amplifier is configured to receive the oscillator output as an input and to generate therefrom an amplified output at a selected wavelength, and (c) configuring a cascaded Raman resonator to receive the amplifier output as an input and to generate therefrom an output having a selected target wavelength and power level; wherein step (a) further includes connecting an isolating element between the oscillator and the amplifier so as to prevent damage to the oscillator resulting from backward propagation of light from the amplifier and cascaded Raman resonator into the oscillator, whereby the power limit requirements for the isolating element depend upon the power level of the oscillator output, and whereby the system is scalable to have amplifier and cascaded Raman resonator outputs having power levels exceeding the power limits of the isolating element. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification