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A system includes a laser configured to generate a pump beam at a pump wavelength. The system also includes a multi-media Raman resonator configured to receive the pump beam and generate an output beam. The multi-media Raman resonator includes multiple mirrors and multiple Raman media optically loca

A system includes a laser configured to generate a pump beam at a pump wavelength. The system also includes a multi-media Raman resonator configured to receive the pump beam and generate an output beam. The multi-media Raman resonator includes multiple mirrors and multiple Raman media optically located between the minors. Output power in the output beam is spectrally concentrated around a single dominant wavelength that is longer than a pump wavelength. The longer wavelength of the output beam is associated with a combination of at least one Stokes shift associated with each of the individual Raman media. A filter could be configured to absorb light at a wavelength that is absorbed by one of the Raman media or to redirect light at the wavelength absorbed by one of the Raman media away from that Raman medium.

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1. A laser system comprising: a multi-media Raman resonator using two or more distinct Raman Media, configured to receive a pump beam and generate an output beam, the multi-media Raman resonator comprising multiple mirrors and multiple Raman media optically located between the mirrors;wherein output

1. A laser system comprising: a multi-media Raman resonator using two or more distinct Raman Media, configured to receive a pump beam and generate an output beam, the multi-media Raman resonator comprising multiple mirrors and multiple Raman media optically located between the mirrors;wherein output power in the output beam is spectrally concentrated around a single dominant wavelength that is longer than a pump wavelength; andwherein the longer wavelength of the output beam is associated with a combination of at least one Stokes shift associated with each of the individual Raman media. 2. The laser system of claim 1, wherein: the Raman media comprise first and second Raman media arranged in series;at least a first of the mirrors is substantially transmissive at a pump wavelength and substantially reflective at first and second Stokes-shifted wavelengths, the first and second Stokes-shifted wavelengths associated with cumulative Stokes shifts provided by the first and second Raman media, respectively; andat least a second of the mirrors is substantially reflective at the first Stokes-shifted wavelength and partially transmissive at the second Stokes-shifted wavelength. 3. The laser system of claim 1, wherein: the Raman media comprise first and second Raman media;at least a first of the mirrors is substantially reflective at a pump wavelength and a first Stokes-shifted wavelength and partially transmissive at a second Stokes-shifted wavelength, the first and second Stokes-shifted wavelengths associated with cumulative Stokes shifts provided by the first and second Raman media, respectively; andat least a second of the mirrors is substantially reflective at the first and second Stokes-shifted wavelengths. 4. The laser system of claim 3, further comprising: a dichroic beamsplitter configured to receive the pump beam and to transmit at least a portion of the pump beam towards the first Raman medium and the first mirror, the dichroic beamsplitter also configured to transmit at least a portion of the pump beam reflected by the first mirror and to reflect light at other wavelengths from the first mirror toward the second Raman medium and the second mirror. 5. The laser system of claim 3, further comprising: a filter configured to absorb light at a wavelength that is absorbed by one of the Raman media or to redirect light at the wavelength absorbed by one of the Raman media away from that Raman medium. 6. The laser system of claim 1, wherein: a first of the Raman media provides partial coverage of a specified output spectral range, leaving a gap in the specified spectral range; anda second of the Raman media provides coverage in at least part of the gap. 7. A laser system comprising: a multi-media Raman resonator, configured to receive a pump beam and generate an output beam, the multi-media Raman resonator comprising multiple mirrors and multiple Raman media optically located between the mirrors;wherein output power in the output beam is spectrally concentrated around a single dominant wavelength that is longer than a pump wavelength;wherein the longer wavelength of the output beam is associated with a combination of at least one Stokes shift associated with each of the individual Raman media;first and second filters configured to filter light at different wavelengths; anda dichroic beamsplitter configured to direct light at a first Stokes-shifted wavelength to the first filter and to direct light at a second Stokes-shifted wavelength to the second filter, the first and second Stokes-shifted wavelengths associated with cumulative Stokes shifts provided by the first and second Raman media, respectively. 8. The laser system of claim 1, wherein: the pump beam has a pump wavelength of about 2 μm; andthe multi-media Raman resonator is configured to shift the pump beam to about 2.4 μm and then to about 2.9 μm. 9. A system comprising: a laser configured to generate a pump beam at a pump wavelength; anda multi-media Raman resonator configured to receive the pump beam and generate an output beam, the multi-media Raman resonator comprising multiple mirrors and multiple Raman media using two or more distinct Raman Media optically located between the mirrors;wherein output power in the output beam is spectrally concentrated around a single dominant wavelength that is longer than a pump wavelength; andwherein the longer wavelength of the output beam is associated with a combination of at least one Stokes shift associated with each of the individual Raman media. 10. The system of claim 9, wherein: the Raman media comprise first and second Raman media arranged in series;at least a first of the mirrors is substantially transmissive at a pump wavelength and substantially reflective at first and second Stokes-shifted wavelengths, the first and second Stokes-shifted wavelengths associated with cumulative Stokes shifts provided by the first and second Raman media, respectively; andat least a second of the mirrors is substantially reflective at the first Stokes-shifted wavelength and partially transmissive at the second Stokes-shifted wavelength. 11. The system of claim 9, wherein: the Raman media comprise first and second Raman media;at least a first of the mirrors is substantially reflective at a pump wavelength and a first Stokes-shifted wavelength and partially transmissive at a second Stokes-shifted wavelength, the first and second Stokes-shifted wavelengths associated with cumulative Stokes shifts provided by the first and second Raman media, respectively; andat least a second of the mirrors is substantially reflective at the first and second Stokes-shifted wavelengths. 12. The system of claim 11, wherein the multi-media Raman resonator further comprises: a dichroic beamsplitter configured to receive the pump beam and to transmit at least a portion of the pump beam towards the first Raman medium and the first mirror, the dichroic beamsplitter also configured to transmit at least a portion of the pump beam reflected by the first mirror and to reflect light at other wavelengths from the first mirror toward the second Raman medium and the second mirror. 13. The system of claim 11, wherein the multi-media Raman resonator further comprises: a filter configured to absorb light at a wavelength that is absorbed by one of the Raman media or to redirect light at the wavelength absorbed by one of the Raman media away from that Raman medium. 14. The system of claim 9, further comprising: a laser controller configured to control the laser. 15. The system of claim 9, further comprising: an acquisition and tracking system configured to track a target; andbeam processing components configured to direct the output beam towards the target. 16. The system of claim 9, wherein: the laser is tunable and configured to vary the pump wavelength of the pump beam; andthe multi-media Raman resonator is configured to generate the output beam at varying wavelengths in a mid-infrared wavelength range. 17. A method comprising: receiving a pump beam at a pump wavelength; andgenerating an output beam using a multi-media Raman resonator, the multi-media Raman resonator comprising multiple mirrors and multiple Raman media using two or more distinct Raman Media optically located between the mirrors;wherein output power in the output beam is spectrally concentrated around a single dominant wavelength that is longer than a pump wavelength; andwherein the longer wavelength of the output beam is associated with a combination of at least one Stokes shift associated with each of the individual Raman media. 18. The method of claim 17, wherein: the Raman media comprise first and second Raman media arranged in series;at least a first of the mirrors is substantially transmissive at a pump wavelength and substantially reflective at first and second Stokes-shifted wavelengths, the first and second Stokes-shifted wavelengths associated with cumulative Stokes shifts provided by the first and second Raman media, respectively; andat least a second of the mirrors is substantially reflective at the first Stokes-shifted wavelength and partially transmissive at the second Stokes-shifted wavelength. 19. The method of claim 17, wherein: the Raman media comprise first and second Raman media;at least a first of the mirrors is substantially reflective at a pump wavelength and a first Stokes-shifted wavelength and partially transmissive at a second Stokes-shifted wavelength, the first and second Stokes-shifted wavelengths associated with cumulative Stokes shifts provided by the first and second Raman media, respectively; andat least a second of the mirrors is substantially reflective at the first and second Stokes-shifted wavelengths. 20. The method of claim 19, further comprising at least one of: absorbing light at a wavelength that is absorbed by one of the Raman media; andredirecting light at the wavelength absorbed by one of the Raman media away from that Raman medium.