共查询到20条相似文献,搜索用时 777 毫秒
1.
2.
分别采用MOTORULA公司的硅基光电二极管探测器和JUDSON公司的InGaAs光电二极管探测器对泵浦光和信号光的脉宽进行了测量.研究了极化周期、工作温度以及抽运功率与周期极化掺镁铌酸锂光学参量振荡器输出的信号光脉冲宽度的作用关系.实验采用LD端面抽运的声光调QNd:YVO4激光器作为抽运源,在晶体温度为30℃、极化周期为29.5μm条件下,当抽运功率为1008mW时,获得了平均功率为238mW的信号光输出,其光-光转换效率为23.6%,最窄脉冲宽度约为9.3ns,相对抽运光脉宽被明显压窄. 相似文献
3.
分别采用MOTORULA公司的硅基光电二极管探测器和JUDSON公司的InGaAs光电二极管探测器对泵浦光和信号光的脉宽进行了测量.研究了极化周期、工作温度以及抽运功率与周期极化掺镁铌酸锂光学参量振荡器输出的信号光脉冲宽度的作用关系.实验采用LD端面抽运的声光调Q Nd∶YVO4激光器作为抽运源,在晶体温度为30 ℃、极化周期为29.5 μm条件下,当抽运功率为1 008 mW时,获得了平均功率为238 mW的信号光输出,其光-光转换效率为23.6%,最窄脉冲宽度约为9.3 ns,相对抽运光脉宽被明显压窄. 相似文献
4.
对基于周期极化掺镁铌酸锂晶体的信号光单谐振光学参量振荡器的输出特性进行了实验研究.讨论了光学参量振荡器谐振腔的腔长、周期极化铌酸锂晶体的通光长度、输出镜的透过率以及抽运光的脉冲宽度对光学参量振荡器谐振阈值的影响.光学参量振荡器的抽运源采用输出波长为1 064 nm的声光调Q Nd∶YVO4激光器,在重复频率为2 kHz、周期极化掺镁铌酸锂晶体的温度为30 ℃的条件下,光学参量振荡器的振荡阈值仅为48 mW.当抽运功率为94 mW时获得了25 mW的信号光输出,其光-光转换效率为26.6%. 相似文献
5.
对基于周期极化掺镬铌酸锂晶体的信号光单谐振光学参量振荡器的输出特性进行了实验研究.讨论了光学参量振荡器谐振腔的腔长、周期极化铌酸锂晶体的通光长度、输出镜的透过率以及抽运光的脉冲宽度对光学参量振荡器谐振阈值的影响.光学参量振荡器的抽运源采用输出波长为1 064 nm的声光调Q Nd:YVO_4激光器,在重复频率为2 kHz、周期极化掺镁铌酸锂晶体的温度为30℃的条件下,光学参量振荡器的振荡阈值仅为48 mW.当抽运功率为94 mW时获得了25 mW的信号光输出,其光-光转换效率为26.6%. 相似文献
6.
7.
本文叙述了具有两个自由度的数字式音乐唱片的光学拾音头系统(TAOHS)并与其它系统进行了比较。音频信号、调焦误差信号和跟踪误差信号来自于四象限光电二极管的四个输出端,此光电二极管用来探测从唱片表面反射并透过物镜和临界角反射棱镜的单激光束的强度分布。本文还讨论了误差信号的来源和唱片倾斜的影响。伺服机构控制物镜在平行和垂直于光轴的两个方向上独立移动来实现自动调焦和跟踪,这种光学探头的尺寸很小,因此它易于适应使用密纹唱片(CD)的唱机。本文还讨论了对光学元件的要求。 相似文献
8.
9.
10.
飞秒光学频率梳波长覆盖范围向可见光波长扩展对于碘稳频激光的绝对频率测量以及光钟研究中钟激光的绝对频率测量都具有十分重要的意义. 本文在自行研制掺Er光纤飞秒光学频率梳的基础上, 采用放大-倍频-扩谱的方案, 实现了激光输出波长向可见光波长的扩展. 掺Er光纤飞秒光学频率梳输出的一部分光激光脉冲, 功率约为8 mW, 首先经掺Er光纤放大器将功率提高到531 mW, 此后利用MgO: PPLN晶体倍频, 倍频后激光的功率为170 mW, 倍频效率为32%, 脉冲宽度为85 fs. 倍频后的激光通过光子晶体光纤进行光谱展宽. 通过优化入射光偏振状态可以实现波长覆盖500-1000 nm, 输出功率为85 mW, 耦合效率为50%. 采用小型化碘稳频532 nm Nd: YAG激光器输出激光与光学频率梳光谱展宽后的激光进行拍频可以获得30 dB的拍频信号. 覆盖可见光波长的掺Er光纤飞秒光学频率梳为可见光范围内激光的绝对频率测量提供了技术手段. 相似文献
11.
激光二极管直接耦合泵浦的高效率Nd:YVO4/KTP腔内倍频激光器 总被引:4,自引:0,他引:4
使激光二极管的发光光面紧贴Nd:YVO4激光晶体,“面对面”直接耦合泵浦,采用KTP晶体腔内倍频,在503mW的泵浦功率下,获得532nm基横模绿光输出约73mW,光光总体转换效率为14.5%。 相似文献
12.
Direct frequency doubling of a wavelength locked laser diode with an optical bandpass filter in a confocal optical configuration is demonstrated. The wavelength of the laser diode was locked in single longitudinal mode oscillation and tuned to phase-matching wavelength of a quasi-phase-matched second harmonic generation device based on a LiTaO3 Waveguide. Stable blue light of 4.2 mW was obtained for incident power of 48 mW. 相似文献
13.
We demonstrate strong optical bistability in a 2 microm continuous-wave Tm,Ho:YLF laser pumped by a 792 nm laser diode near room temperature. The bistable region is as much as 100 mW wide at 283 K and can be controlled by the temperature of the laser crystal. The influence of crystal temperature on the characteristics of optical bistability is obtained. The influence of the pump-to-mode ratio on the bistable characteristics of the laser is also discussed. To our knowledge this is the first report of optical bistability effects in Tm,Ho:YLF lasers. 相似文献
14.
Doubly resonant continuous-wave optical parametric oscillator pumped by a single-mode diode laser 总被引:1,自引:0,他引:1
The performance characteristics of a doubly (signal and idler) resonant continuous-wave optical parametric oscillator based on periodically poled lithium niobate and pumped by a 100-mW single-mode laser diode at 810 nm are reported. Pump power thresholds as low as 16 mW and wavelength tuning over the range 1.15-1.25 microm at the signal and 2.31-2.66 microm at the idler were achieved through variation of crystal temperature, pump wavelength, and grating period. Up to 5 mW of signal output was obtained with the single-mode diode pump, and signal powers of up to 39 mW were obtained when pumping with a 400-mW injection-locked broad-area diode laser. 相似文献
15.
We report analytical and experimental studies on the characteristics of a high-brightness laser diode endpumped Nd:YVO4/KTP laser. A simple model was developed to optimize the cavity parameters and estimate the green output power of intracavity frequency doubled lasers. Using a 1 W high-brightness laser diode as the pump source, high efficiency operation was realized. The second-harmonic output power at 532 nm was measured to be 286.5 mW at an incident pump power of 881.4 mW, corresponding to an optical to optical efficiency of 32.5%. 相似文献
16.
17.
18.
D.?Skoczowsky A.?Jechow H.?Stürmer T.?Po?ner J.?Sacher R.?Menzel 《Applied physics. B, Lasers and optics》2010,98(4):751-757
A quasi-monolithic second-harmonic-generation ring resonator assembled with miniaturized components is presented. The ring
contains a 10-mm-long bulk periodically poled lithium niobate crystal for second-harmonic generation, four plane mirrors and
two gradient-index lenses. All parts are mounted on a glass substrate with an overall size of 19.5 mm×8.5 mm×4 mm. As pump
source a broad-area laser diode operated in an external resonator with Littrow arrangement is utilized. This external cavity
diode laser provides near diffraction limited, narrow-bandwidth emission with an optical output power of 450 mW at a wavelength
of 976 nm. Locking of the diode laser emission to the resonance frequency of the ring cavity was achieved by an optical self-injection
locking technique. With this setup more than 126 mW of diffraction-limited blue light at 488 nm could be generated. The opto–optical
conversion efficiency was 28% and a wall plug efficiency better than 5.5% could be achieved. 相似文献
19.
We experimentally investigate the performance of a commercial tapered amplifier diode operating in a pulsed-current mode with a peak current that is significantly higher than the specified maximum continuous current. For a tapered amplifier rated at 500 mW of continuous power, we demonstrate 2.6 W of peak optical output power with 15 mW of injection light for 200 micros, 7 A current pulses. Different failure mechanisms for the tapered amplifier, including thermal and optical damage, are identified under these conditions. 相似文献