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808-nm fiber coupled module with a CW output power up to 130 W 总被引:1,自引:0,他引:1
A fiber coupled module is fabricated with integrating the emitting light from four laser diode bars into multimode fiber bundle.The continuous wave(CW)output power of the module is about 130 W with a coupling efficiency of around 80%.The output power is very stable after the temperature cycling and vibration test.No apparent power decrease has been observed as the device working continuously for 500 h. 相似文献
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The layer structure of GaInP/AlGaInP quantum well laser diodes (LDs) was grown on GaAs substrate using low-pressure metalorganic chemical vapor deposition (LP-MOCVD) technique. In order to improve the catastrophic optical damage (COD) level of devices, a nonabsorbing window (NAW), which was based on Zn diffusion-induced quantum well intermixing, was fabricated near the both ends of the cavities. Zn diffusions were respectively carried out at 480, 500, 520, 540, and 580℃ for 20 minutes. The largest energy blue shift of 189.1 meV was observed in the window regions at 580℃. When the blue shift was 24.7 meV at 480℃, the COD power for the window LD was 86.7% higher than the conventional LD. 相似文献
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Low-Threshold-Current and High-out-Power 660 nm Laser Diodes with a p-GaAs Current Blocking Layer for DVD-RAM/R
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We investigate a new structure of high-power 660-nm AlGaInP laser diodes. In the structure, a p-GaAs layer is grown on the ridge waveguide serving as the current-blocking layer, and nonabsorbing windows are only fabricated near the cavity facets to increase the catastrophic-optical-damage level. Stable fundamental mode operation was achieved at up to 80roW without kinks, and the maximum output power was 184roW at 22~C. The threshold current was 40 mA. 相似文献
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Diode-Pumped Passively Q-Switched Yb:YAG Microchip Laser with a GaAs as Saturable Absorber
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A passively Q-switched Yb: YAG microchip laser has been constructed by using a doped GaAs as the saturable absorber as well as the output coupler. At 13.5 W of pump power the device produces high-quality 3.4μJ 52ns pulses at 1030nm with a pulse repetition rate of 7.8 kHz in a TEM00-mode. 相似文献
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Stable mode-locking in an Yb:YAG laser with a fast SESAM 总被引:4,自引:0,他引:4
Stable mode-locking in a diode-pumped Yb:YAG laser was obtained with a very fast semiconductor sat-urable absorber mirror (SESAM). The pulse width was measured to be 4 ps at the central wavelength of 1047 nm. The average power was 200 mW and the repetition rate was 200 MHz. 相似文献
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利用电致发光(EL)的方法,研究了突然失效的975 nm大功率应变量子阱激光器。起初,我们以为激光器失效是由于腔面发生了突然光学灾变(COMD)。然而,通过EL实验,发现其中一部分激光器腔面没有任何损伤,而内部发生了突然光学灾变(COBD),为工艺的进一步改善指明了方向。对90只发生COD的激光器进行EL成像,发现暗线缺陷(DLD)起始于腔面或是激光器内部。DLD是严重的非辐射复合区,通常沿着有源区延伸出几个分支,造成激光器功率急剧下降。详细分析了不同COD模式的特征并进行了对比。并进一步分析了两种典型COD模式发生的原因,然后给出了抑制COD和提高大功率半导体激光器性能的建议。 相似文献
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