System and Method of Providing Second Harmonic Generation (SHG) Light in a Single Pass
A system and method of providing second harmonic generation (SHG) light in a single pass. A frequency stabilized semiconductor seed laser provides a first frequency light to a fiber amplifier. A focusing optic configuration receives the amplified first frequency light and focuses the amplified first frequency light into a non-linear material. A harmonic separator separates the first frequency light from the second frequency light and an optical output structure outputs the second frequency light.
1 . A single-pass system for producing second harmonic generation (SHG) light comprising:
a frequency stabilized seed laser, wherein the frequency stabilized seed laser is a semiconductor distributed Bragg reflector (DBR) laser or a semiconductor Fabry-Perot laser plus a fiber Bragg grating (FP+FBG);
a fiber amplifier receiving a first frequency light from the frequency stabilized semiconductor seed laser;
a non-linear material generating a second frequency light;
a focusing optic configuration receiving the first frequency light from the fiber amplifier and focusing the first frequency light into the non-linear material;
a harmonic separator filtering the first frequency light from the second frequency light; and
an output optical structure outputting the second frequency light from the single-pass system.
2 . (canceled)
3 . The system of claim 1 further comprising the frequency stabilized semiconductor seed laser operating in the coherence collapse regime.
4 . The system of claim 1 , wherein the non-linear material is selected from a group of PPKTP, PPMgLN, PPLN, and PPSLT.
5 . The system of claim 1 , wherein the second frequency light is in the visible light range.
6 . The system of claim 1 further comprising the single-pass system outputting a second frequency light at greater than 0.5 watts.
7 . The system of claim 1 further comprising the single-pass system outputting a second frequency light at greater than 3.0 watts.
8 . The system of claim 1 further comprising a polarization maintaining (PM) optical fiber.
9 . A single-pass method for producing a second harmonic generation (SHG) light comprising:
producing a first frequency light in a frequency stabilized semiconductor seed laser comprising a semiconductor distributed Bragg reflector (DBR) laser, or a semiconductor Fabry-Perot laser plus a fiber Bragg grating (FP+FBG);
amplifying the first frequency light in a fiber amplifier;
focusing the first frequency light into a non-linear material;
generating a second frequency light in the non-linear material;
separating the first frequency light from the second frequency light; and
outputting the second frequency light.
10 . (canceled)
11 . The method of claim 9 further comprising operating the frequency stabilized semiconductor seed laser in the coherence collapse regime.
12 . The method of claim 9 further comprising selecting the non-linear material from a group of PPKTP, PPMgLN, PPLN, and PPSLT.
13 . The method of claim 9 further comprising outputting the second frequency light in a visible light range.
14 . The method of claim 9 further comprising outputting the second frequency light at greater than 0.5 watts in a single pass.
15 . The method of claim 14 further comprising outputting the second frequency light at greater than 3.0 watts in a single pass.
16 . The method of claim 9 further comprising polarization maintaining (PM) optical fiber.
17 . A single-pass method for producing a second harmonic generation (SHG) light comprising:
operating a frequency stabilized semiconductor distributed Bragg reflector (DBR) laser or a semiconductor Fabry-Perot laser plus a fiber Bragg grating (FP+FBG) in the coherence collapse regime;
producing a first frequency light in the frequency stabilized seed laser;
amplifying the first frequency light in a fiber amplifier;
focusing the first frequency light into a non-linear crystal;
generating a second frequency light in the non-linear crystal;
separating the first frequency light from the second frequency light; and
outputting a single-pass second frequency.
18 . The method of claim 17 further comprising selecting a non-linear material from a group comprising PPKTP, PPMgLN, PPLN, and PPSLT.
19 . The method of claim 17 further comprising outputting a single-pass second frequency in the visible light range.
20 . The method of claim 17 further comprising outputting a single-pass second frequency at greater than 0.5 watts.