Optimization of ~1 μm Band Laser Performance of Long Cavity Nd∶GYAP Laser with LBO Crystal

Abstract

Abstract: A method of optimizing the stability of the resonant cavity by adding an additional crystal into the laser resonant cavity is studied for the first time. The laser performance can be effectively improved by adding crystals with appropriate refractive index into the resonant cavity. In this study, a Nd³⁺∶Gd_0.1Y_0.9AlO₃ (Nd∶GYAP) crystal laser device was built, and LBO crystal were added into the resonant cavity. The effects of LBO crystal on the laser properties of b-cut and c-cut crystals were compared respectively. The laser performance with and without LBO crystal was characterized in terms of output power, laser wavelength, beam quality and polarization characteristics. When LBO crystal is inserted into the laser resonant cavity, the slope efficiency of b-cut Nd∶GYAP increases from 18.9% to 24.3%, and that of c-cut Nd∶GYAP increases from 2.87% to 10.07% without changing the spectrum and beam quality. The maximum output power of b-cut crystal increases from 0.931 W to 1.254 W, and that of c-cut crystal increases from 63 mW to 134 mW. However, the polarization of the output laser deflects to some extent due to the optical rotation effect. This research provides a way to improve the slope efficiency and output power of lasers in the cases of the cavity length must be extended such as tuning and mode-locking operations.

Key words: LBO, Nd∶GYAP, ~1 μm laser, output power, laser spectrum, beam quality, polarization characteristic

CLC Number:

O73
TN248

CHEN Qiudi, ZHENG Weibi, ZHANG Peixiong, LI Zhen, CHEN Zhenqiang. Optimization of ~1 μm Band Laser Performance of Long Cavity Nd∶GYAP Laser with LBO Crystal[J]. Journal of Synthetic Crystals, 2023, 52(3): 405-413.

References

[1] KE D X, VU A A, BANDYOPADHYAY A, et al. Compositionally graded doped hydroxyapatite coating on titanium using laser and plasma spray deposition for bone implants[J]. Acta Biomaterialia, 2019, 84: 414-423.
[2] JACKSON S D. Towards high-power mid-infrared emission from a fibre laser[J]. Nature Photonics, 2012, 6(7): 423-431.
[3] JI Q, ZONG S G, YANG J B. Application and development trend of laser technology in military field[C]//Proc SPIE 11606, ICOSM 2020: Optoelectronic Science and Materials, 2020, 11606: 32-40.
[4] RAVI-KUMAR S, LIES B, ZHANG X, et al. Laser ablation of polymers: a review[J]. Polymer International, 2019, 68(8): 1391-1401.
[5] LE H T T, TRUONG VAN C, NGUYEN THI M, et al. Our experience using 1064 nm Nd∶YAG in palmoplantar warts[J]. Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology, 2022, 24(1/2/3/4/5): 28-32.
[6] 张继魁, 时家明, 苗雷, 等. 近中红外与1.06 μm和1.54 μm激光兼容隐身光子晶体研究[J]. 发光学报, 2016, 37(9): 1130-1134.
ZHANG J K, SHI J M, MIAO L, et al. Research on compatible stealth photonic crystal against near/middle infrared and 1.06 μm and 1.54 μm lasers[J]. Chinese Journal of Luminescence, 2016, 37(9): 1130-1134 (in Chinese).
[7] CHEN Y F, PAN Y Y, LIU Y C, et al. Efficient high-power continuous-wave lasers at green-lime-yellow wavelengths by using a Nd∶YVO₄ self-Raman crystal[J]. Optics Express, 2019, 27(3): 2029-2035.
[8] WU D C, JONES I T, BOEN M, et al. A randomized, split-face, double-blind comparison trial between fractionated frequency-doubled 1 064/532 nm picosecond Nd∶YAG laser and fractionated 1 927 nm thulium fiber laser for facial photorejuvenation[J]. Lasers in Surgery and Medicine, 2021, 53(2): 204-211.
[9] 崔建丰, 李福玖, 邬小娇, 等. 高能量高转换效率355 nm紫外激光器[J]. 发光学报, 2018, 39(12): 1730-1734.
CUI J F, LI F J, WU X J, et al. High energy and high conversion efficiency 355 nm UV laser[J]. Chinese Journal of Luminescence, 2018, 39(12): 1730-1734 (in Chinese).
[10] JU M, XIAO Y, SUN W G, et al. In-depth determination of the microstructure and energy transition mechanism for Nd³⁺-doped yttrium oxide laser crystals[J]. The Journal of Physical Chemistry C, 2020, 124(3): 2113-2119.
[11] YI G Q, LI W W, SONG J H, et al. Structural, spectroscopic and thermal properties of hot-pressed Nd∶(Ca_0.94Gd_0.06)F_2.06 transparent ceramics[J]. Journal of the European Ceramic Society, 2018, 38(9): 3240-3245.
[12] LI D, LIU Q, ZHANG P X, et al. Crystal growth, optical properties and laser performance of new mixed Nd³⁺ doped Gd_0.1Y_0.9AlO₃ crystal[J]. Journal of Alloys and Compounds, 2019, 789: 664-669.
[13] JING W, LOIKO P, BASYROVA L, et al. Spectroscopy and laser operation of highly-doped 10at.% Yb∶(Lu, Sc)₂O₃ ceramics[J]. Optical Materials, 2021, 117: 111128.
[14] ZHANG N, WANG Z X, LIU S D, et al. Watt-level femtosecond Tm-doped “mixed” sesquioxide ceramic laser in-band pumped by a Raman fiber laser at 1627 nm[J]. Optics Express, 2022, 30(13): 23978-23985.
[15] 石自彬, 方新, 于永贵, 等. 无序Nd∶CNGG晶体的生长及激光性能研究[J]. 人工晶体学报, 2008, 37(2): 360-362+359.
SHI Z B, FANG X, YU Y G, et al. Growth and laser property of a disordered Nd∶CNGG crystal[J]. Journal of Synthetic Crystals, 2008, 37(2): 360-362+359 (in Chinese).
[16] ZHOU H Q, ZHU S Q, LI Z, et al. Investigation on 1.0 and 1.3 μm laser performance of Nd³⁺∶GYAP crystal[J]. Optics & Laser Technology, 2019, 119: 105601.
[17] WANG Y H, CHEN Q D, ZHANG P X, et al. Fabrication of Sb₂O₃ by an improved chemical reaction assisted vertical micro sublimation method and its saturable absorber performance[J]. Optical Materials Express, 2022, 12(4): 1337-1346.
[18] HONG H, CHEN Q D, WANG Y H, et al. An effective 2D saturable absorber In₂O₃ to realize passively Q-switched laser output[J]. Optics & Laser Technology, 2022, 155: 108375.
[19] 于浩海, 潘忠奔, 张怀金, 等. 无序激光晶体及其超快激光研究进展[J]. 人工晶体学报, 2021, 50(4): 648-668+583.
YU H H, PAN Z B, ZHANG H J, et al. Development of disordered laser crystals and their ultrafast lasers[J]. Journal of Synthetic Crystals, 2021, 50(4): 648-668+583 (in Chinese).
[20] ARKHIPOV M V, ARKHIPOV R M, SHIMKO A A, et al. Mode locking in a Ti: sapphire laser by means of a coherent absorber[J]. JETP Letters, 2019, 109(10): 634-637.
[21] STEHLÍK M, ŠULC J, BOHÁČEK P, et al. Wavelength tunability of laser based on Yb-doped GGAG crystal[J]. Laser Physics, 2018, 28(10): 105802.
[22] YAN R P, LIU Y, LI X D, et al. Harmonic mode locking underneath the Q-switched envelope in passively Q-switched mode-locked Nd∶GdTaO₄ 1066 nm laser[J]. Infrared Physics & Technology, 2020, 111: 103553.
[23] LING W J, XIA T, DONG Z, et al. Passively mode-locked Tm, Ho∶LLF laser at 1895 nm[J]. Journal of Optics, 2019, 48(2): 209-213.
[24] 王希军. 56 MHz重复频率端泵SESAM连续波锁模Nd∶YVO₄激光器[J]. 发光学报, 2012, 33(12): 1342-1346.
WANG X J. 56 MHz end pumping Nd∶YVO₄ SESAM CW mode-locked lasers[J]. Chinese Journal of Luminescence, 2012, 33(12): 1342-1346 (in Chinese).
[25] MAO T W, DUAN Y M, CHEN S M, et al. Yellow and orange light selectable output generated by Nd∶YAP/YVO₄/LBO Raman laser[J]. IEEE Photonics Technology Letters, 2019, 31(13): 1112-1115.
[26] FERREIRA M S, WETTER N U. Diode-side-pumped, intracavity Nd∶YLF/KGW/LBO Raman laser at 573 nm for retinal photocoagulation[J]. Optics Letters, 2021, 46(3): 508-511.
[27] 薛建华, 任清华, 王爱坤. LBO晶体Ⅱ类相位匹配走离角及互作用长度的计算[J]. 人工晶体学报, 2009, 38(6): 1463-1466+1471.
XUE J H, REN Q H, WANG A K. Calculation of type Ⅱ phase-matching walk-off angle and interaction length of LBO crystals[J]. Journal of Synthetic Crystals, 2009, 38(6): 1463-1466+1471 (in Chinese).
[28] SHILOVA G V, SIROTKIN A A, ZVEREV P G. Diode pumped Nd₃∶YVO₄ laser with intracavity SHG in LBO and SRS in Ba(NO₃)₂[C]//2018 International Conference Laser Optics (ICLO). June 4-8, 2018, St. Petersburg, Russia. IEEE, 2018: 37.
[29] GAO Y H, LI Y J, FENG J X, et al. Low noise continuous-wave single-frequency dual-wavelength laser operating at 532 nm and 1.06 μm[J]. Chinese Journal of Lasers, 2019, 46(4): 0401005.
[30] ZOU J Y, ZHOU L B, ZHENG W X, et al. An in-band diode-end-pumped high-power and high-efficiency ultrashort pulse Nd∶YVO₄ bulk laser mode-locked by a frequency doubling LBO crystal[J]. Infrared Physics & Technology, 2021, 116: 103759.
[31] 刘娟, 谢茹. 旋光现象借助MATLAB的图形呈现[J]. 电子测试, 2013(5): 220-221.
LIU J, XIE R. The MATLAB sketch description of the rotate light phenomenon[J]. Electronic Test, 2013(5): 220-221 (in Chinese).