Multiple frequency medical laser

A laser system, comprising:

• first means for highly reflecting a plurality of wavelengths along an optical path;
• fixed, adjustable output coupler for the plurality of wavelengths;
• a gain medium, mounted in the optical path, providing laser gain at the plurality of wavelengths;
• means for inducing laser gain in the gain medium in the plurality of wavelengths and generating an output beam at selected wavelengths through the output coupler;
• a plurality of beam-turning mirrors, each suppressing oscillation of at least a selected subset of the plurality of wavelengths and reflective of at least a selected wavelength, and means for selectively positioning one of the plurality of the beam-turning mirrors in the optical path, so that the output coupler and first means from a laser resonator to enable oscillation at the selected wavelength;
• a beam delivery system, including a beam input coupler to supply the output beam from said fixed, adjustable output coupler into an optical fiber, the beam delivery system mounted in a fixed position and aligned with the fixed, adjustable output coupler for efficient coupling of the output beam though the beam input coupler.

A laser system, comprising:

• first means for highly reflecting a plurality of wavelengths along an optical path;
• a fixed, adjustable output coupler for the plurality of wavelengths to provide a first output beam;
• a gain medium, mounted in the optical path, providing laser gain at the plurality of wavelengths;
• means for inducing laser gain in the gain medium in the plurality of wavelengths and generating an output beam at selected wavelengths through the fixed, adjustable output coupler;
• means, mounted in the optical path, for extracting an output wavelength derived from one of the plurality of wavelengths, said means further including means for directing a reflected beam along the optical path to form a laser resonator with the first means and provide a second output beam;
• a plurality of wavelength-selective beam-turning elements, and means for positioning a selected one of the wavelength-selective beam-turning elements in the optical path for directing a selected wavelength of the plurality of wavelengths toward the fixed, adjustable output coupler so that the fixed, adjustable output coupler and first means form a laser resonator generating the output beam at a selected wavelength, or positioning none of the wavelength-selective beam-turning elements in the optical path to direct at least one wavelength toward the means for extracting sot hat the means for extracting and the first means form a laser resonator generating the second output beam;
• and
• a beam delivery system, including a beam input coupler to supply the first output beam into an optical fiber, the beam delivery system mounted in a fixed position and aligned with the fixed, adjustable output coupler for efficient coupling of the first output beam though the beam input coupler.

A laser system, comprising:

• a high reflector, a beam-turning mirror and a fixed, adjustable output coupler in a resonant path for outputting a wavelength near 1.44 micron;
• an Nd:YAG gain medium, mounted in the resonant path, for providing laser gain;
• and
• means for including laser gain in the gain medium to generate an output beam through the fixed, adjustable output coupler;
• wherein
• the beam-turning mirror is reflective at near 1.44 micron and transmissive at least one higher gain line of the Nd:YAG gain medium, while suppressing oscillation at higher gain lines and enabling oscillation at near 1.44 micron;
• and
• a beam delivery system, including a beam input coupler to supply the output beam into an optical fiber, the beam delivery system mounted in a fixed positions and aligned with the fixed, adjustable output coupler for efficient coupling of the output beam though the beam input coupler.

A laser system, comprising:

• a gain medium for providing laser gain at a plurality of wavelengths;
• means, coupled with the gain medium, for inducing laser gain int eh gain medium in the plurality of wavelengths;
• a first fixed, adjustable output coupler having a first selected wavelength to supply a first output beam;
• a second fixed, adjustable output coupler having a second selected wavelength to supply a second output beam;
• means, supporting the gain medium, for selectively aligning the gain medium with one of the first or the second fixed, adjustable output coupler to selectively enable laser oscillation of selected wavelengths along an optical path through the gain medium;
• and
• beam delivery means, mounted in fixed relationship to the first and second fixed, adjustable output couplers, for receiving the first and second output beams from the first and second fixed, adjustable output couplers and selectively delivering one of the first and second output beams to a work site.