We report a low noise continuous-wave （CW） single-frequency 1.5-μm laser source obtained by a singly resonant optical parametric oscillator （SRO） based on periodically poled lithium niobate （PPLN）. The SRO was ...We report a low noise continuous-wave （CW） single-frequency 1.5-μm laser source obtained by a singly resonant optical parametric oscillator （SRO） based on periodically poled lithium niobate （PPLN）. The SRO was pumped by a CW single-frequency Nd：YVO4 laser at 1.06μm. The 1.02 W of CW single-frequency signal laser at 1.5 μm was obtained at pump power of 6 W. At the output power of around 0.75 W, the power stability was better than ±l.5% and no mode-hopping was observed in 30 min and frequency stability was better than 8.5 MHz in 1 min. The signal wavelength could be tuned from 1.57 to 1.59 μm by varying the PPLN temperature. The 1.5-μm laser exhibits low noise characteristics, the intensity noise of the laser reaches the shot noise limit （SNL） at an analysis frequency of 4 MHz and the phase noise is less than 1 dB above the SNL at analysis frequencies above 10 MHz.展开更多
Eye-safe 1.5～1.6 μm lasers have important applications in optical fiber communication, medicine, laser-range-finding, lidar, etc. Er^3＋ and Yb^3＋ co-doped crystal pumped by diode laser around 976 nm is an attracti...Eye-safe 1.5～1.6 μm lasers have important applications in optical fiber communication, medicine, laser-range-finding, lidar, etc. Er^3＋ and Yb^3＋ co-doped crystal pumped by diode laser around 976 nm is an attractive method for obtaining 1.5～1.6 μm laser in compact device with high output beam quality. In this paper, the recent research and progress of several important Er^3＋ and Yb^3＋ co-doped laser crystals at 1.5～1.6 μm in authors’ lab are reported.展开更多
By combining the thermally-induced spectral broadening of Er^(3+)/Yb^(3+)co-doped crystal and the high ratio of cavity gain to loss,a high-power broadband continuously tunable 1.5-1.6μm laser was successfully demonst...By combining the thermally-induced spectral broadening of Er^(3+)/Yb^(3+)co-doped crystal and the high ratio of cavity gain to loss,a high-power broadband continuously tunable 1.5-1.6μm laser was successfully demonstrated in an Er:Yb:YAl_(3)(BO_(3))_(4)crystal.End-pumped by a continuous-wave 975.6 nm laser diode,three discrete tunable laser bands at 1483–1488,1495–1503,and 1521–1612 nm were realized at an incident pump power of 7.7 W.The maximum continuously tunable bandwidth was 91 nm at 1521–1612 nm,and the maximum output power was 474 m W at 1551 nm.The output power was generally higher than100 m W in the whole tunable range.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.60878003)the Science Fund for Excellent Research Team of the National Natural Science Foundation of China(Grant No.60821004)the National Basic Research Program of China(Grant No.2010CB923101)
文摘We report a low noise continuous-wave （CW） single-frequency 1.5-μm laser source obtained by a singly resonant optical parametric oscillator （SRO） based on periodically poled lithium niobate （PPLN）. The SRO was pumped by a CW single-frequency Nd：YVO4 laser at 1.06μm. The 1.02 W of CW single-frequency signal laser at 1.5 μm was obtained at pump power of 6 W. At the output power of around 0.75 W, the power stability was better than ±l.5% and no mode-hopping was observed in 30 min and frequency stability was better than 8.5 MHz in 1 min. The signal wavelength could be tuned from 1.57 to 1.59 μm by varying the PPLN temperature. The 1.5-μm laser exhibits low noise characteristics, the intensity noise of the laser reaches the shot noise limit （SNL） at an analysis frequency of 4 MHz and the phase noise is less than 1 dB above the SNL at analysis frequencies above 10 MHz.
基金Supported by the National Natural Science Foundation of China (No. 50590405 and 50802094)the Major Programs of the Chinese Academy of Sciences (No. SZD08001-1)+1 种基金the Natural Science Foundation of Fujian Province (No. 2008J0173)the Knowledge Innovation Program of the Chinese Academy of Sciences
文摘Eye-safe 1.5～1.6 μm lasers have important applications in optical fiber communication, medicine, laser-range-finding, lidar, etc. Er^3＋ and Yb^3＋ co-doped crystal pumped by diode laser around 976 nm is an attractive method for obtaining 1.5～1.6 μm laser in compact device with high output beam quality. In this paper, the recent research and progress of several important Er^3＋ and Yb^3＋ co-doped laser crystals at 1.5～1.6 μm in authors’ lab are reported.
基金the National Key Research and Development Program of China(No.2021YFB3601504)the National Natural Science Foundation of China(No.52272010)+1 种基金the Natural Science Foundation of Fujian Province(No.2023J02027)the Scientific Instrument Developing Project of the Chinese Academy of Sciences(No.YZLY202001)。
文摘By combining the thermally-induced spectral broadening of Er^(3+)/Yb^(3+)co-doped crystal and the high ratio of cavity gain to loss,a high-power broadband continuously tunable 1.5-1.6μm laser was successfully demonstrated in an Er:Yb:YAl_(3)(BO_(3))_(4)crystal.End-pumped by a continuous-wave 975.6 nm laser diode,three discrete tunable laser bands at 1483–1488,1495–1503,and 1521–1612 nm were realized at an incident pump power of 7.7 W.The maximum continuously tunable bandwidth was 91 nm at 1521–1612 nm,and the maximum output power was 474 m W at 1551 nm.The output power was generally higher than100 m W in the whole tunable range.
