TY - GEN
T1 - High-power, continuous-wave, scalable, single-frequency 852nm laser source for 213nm generation
AU - Kaneda, Yushi
AU - Tago, Tsuyoshi
AU - Sasa, Toshiaki
AU - Sasaura, Masahiro
AU - Nakao, Hiroaki
AU - Hirohashi, Junji
AU - Furukawa, Yasunori
N1 - Publisher Copyright:
© 2019 SPIE.
PY - 2019
Y1 - 2019
N2 - We developed a high-power, continuous-wave (CW), single-frequency 852nm laser source, for the purpose of fourth harmonic generation at 213nm. Our approach is the doubly resonant sum-frequency mixing (DRSFM) with two fiber sources. An in-house single-frequency master oscillator at 1907nm is amplified by an in-house clad-pumped amplifier to 5W, and a commercial single-frequency master oscillator at 1540nm is amplified by a commercial amplifier to 10W. The two beams are combined via a dichroic mirror to a single beam before incident on a dual-wavelength resonator, consisting of one set of dual-wavelength mirrors. The external resonator is locked to the 1907nm laser frequency, and the frequency of the 1540nm is locked to the resonator, realizing double-resonance. With a periodically-poled stoichiometric lithium tantalate in the resonator, the sum-frequency at 852nm is efficiently generated. All 3 waves are in the same polarization (e-ray), allowing the effective use of Brewster-cut device, eliminating reflection loss for all wavelengths without any antireflection coatings. With 4.6W at 1907nm and 7.7W at 1540nm incident onto the resonator, 5.2W at 852nm was generated, representing the efficiency of greater than 40%. The experimental result indicates our current setup will be more efficient with higher input powers at 1907nm. With both fiber sources at 1540nm and 1907nm being scalable in output power, the output at 852nm is also scalable. By the forth harmonic of 852nm, 0.456 W CW 213nm was generated.
AB - We developed a high-power, continuous-wave (CW), single-frequency 852nm laser source, for the purpose of fourth harmonic generation at 213nm. Our approach is the doubly resonant sum-frequency mixing (DRSFM) with two fiber sources. An in-house single-frequency master oscillator at 1907nm is amplified by an in-house clad-pumped amplifier to 5W, and a commercial single-frequency master oscillator at 1540nm is amplified by a commercial amplifier to 10W. The two beams are combined via a dichroic mirror to a single beam before incident on a dual-wavelength resonator, consisting of one set of dual-wavelength mirrors. The external resonator is locked to the 1907nm laser frequency, and the frequency of the 1540nm is locked to the resonator, realizing double-resonance. With a periodically-poled stoichiometric lithium tantalate in the resonator, the sum-frequency at 852nm is efficiently generated. All 3 waves are in the same polarization (e-ray), allowing the effective use of Brewster-cut device, eliminating reflection loss for all wavelengths without any antireflection coatings. With 4.6W at 1907nm and 7.7W at 1540nm incident onto the resonator, 5.2W at 852nm was generated, representing the efficiency of greater than 40%. The experimental result indicates our current setup will be more efficient with higher input powers at 1907nm. With both fiber sources at 1540nm and 1907nm being scalable in output power, the output at 852nm is also scalable. By the forth harmonic of 852nm, 0.456 W CW 213nm was generated.
KW - Fiber lasers
KW - Frequency doubled lasers
KW - Harmonic generation and mixing
KW - Ultraviolet lasers
UR - http://www.scopus.com/inward/record.url?scp=85066752951&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066752951&partnerID=8YFLogxK
U2 - 10.1117/12.2506231
DO - 10.1117/12.2506231
M3 - Conference contribution
AN - SCOPUS:85066752951
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Nonlinear Frequency Generation and Conversion
A2 - Schunemann, Peter G.
A2 - Schepler, Kenneth L.
PB - SPIE
T2 - Nonlinear Frequency Generation and Conversion: Materials and Devices XVIII 2019
Y2 - 5 February 2019 through 7 February 2019
ER -