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21.
高功率单频激光在激光雷达、光谱学、精密测量等领域具有广阔的应用前景.采用中心波长为1064 nm、光谱线宽为20 kHz、偏振消光比(PER)高于20 dB的单频线偏振分布式反馈光纤激光器做种子源(尾纤输出功率约为10 mW),利用种子注入主振荡功率光纤放大技术,通过两级级联放大实现了128 W高功率单频、线偏振、近衍射极限单模连续激光输出.主放大器光-光效率达到83%,PER高于12 dB.采用分段温控技术有效地提高了光纤中的受激布里渊散射(SBS)阈值,实验中未观察到明显的放大自发辐射和SBS现象,进
关键词:
掺Yb光纤放大器
主振荡功率光纤放大
单频
线偏振 相似文献
22.
We report a switchable dual-wavelength fiber grating laser in linear overlapping cavity. The laser features two overlapping cavities sharing a single Yb-doped gain medium fiber and two sets of fiber Bragg gratings. A coiling fiber setup is inserted into the 1035 nm laser cavity. Given that the bending loss is inversely related to the bending radius, the cavity loss of 1035-nm can be modulated. Modulating the bending loss facilitates the switching of the fiber grating laser to a single-or dual-wavelength output at 1030 or 1035 nm and convenient tuning of the power ratio of the two wavelengths. An approximately 152.6-mW output power and up to 38-dB polarization extinction ratio are observed. The simultaneous lasing at I030 and 1035 nm is a qualified seeder source for amplification to high power scale and can be applied to difference frequency generation of a terahertz signal. This dual-wavelength fiber grating laser is a potential pump source for generating terahertz radiation using a novel approach. 相似文献
23.
We report an all-fiber high power,single frequency large-mode area (LMA) linearly polarized ytterbiumdoped fiber amplifiers (YDFA) module,which is based on the master oscillator multi-stage power amplifiers (MOPA).The maximum output power is 43.8 W at a wavelength of 1064 nm when 60-W launched pump light is coupled,with high slope efficiency of 88%,polarization extinction rate (PER) >17.2 dB and nearly diffraction-limited beam quality (M 2 <1.1). 相似文献