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We investigate the resonantly side-pumped 1645-nm Er:YAG crystal fiber laser utilizing a gold-embedded grating coupler. The 91.5% pump coupling efficiency and 73% laser slope efficiency can be achieved in a 18-cm double-clad crystal fiber laser.
Grating couplers for side coupling of the light from a high-power laser diode array (LDA) into the inner cladding of a double-clad fiber were studied theoretically and implemented experimentally. In the experiments, two types of grating couplers were designed and fabricated: a gold-coated surface relief grating coupler and a gold-embedded silica grating coupler. A suitable design for heat dissipation...
A novel distributed multi-fiber side coupling scheme was integrated on single laser diode stack (LDS) by using the grating coupler. The launched power was 100.2 W from a 231.6 W continuous-wave LDS at 976 nm.
High brightness diode pump source is becoming a matter of concern for developing high power fiber laser [1]. It is crucial to convert the high power emission but low brightness laser diode array source into a kind of high brightness source and maintain the same power level. Complex beam-shaping methods for each single emitter was used in the past [2,3]. In order to increase the efficiency and compactness,...
A sub-wavelength gold-embedded silica binary grating for side coupling light emission from a 976-nm high-power laser diode array into the 400-μm-diameter inner cladding of a double-clad fiber was demonstrated with near 50% overall coupling efficiency.
Embedded reflection gratings for distributed pumping by laser diode bar in Yb-doped fiber lasers are studied. The best optimal coupling efficiencies of ≫92% and ≫82% are obtained in binary and blazed gratings, respectively. At 915-nm pumping, fabrication and alignment tolerances are analyzed.
Embedded reflection gratings for distributed pumping by laser diode bar in Yb-doped fiber lasers are studied. The best optimal coupling efficiencies of ≫92% and ≫82% are obtained in binary and blazed gratings, respectively. At 915-nm pumping, fabrication and alignment tolerances are analyzed.
Embedded reflection gratings for distributed pumping by laser diode bar in Yb-doped fiber lasers are studied. The best optimal coupling efficiencies of >92% and >82% are obtained in binary and blazed gratings, respectively. At 915-nm pumping, fabrication and alignment tolerances are analyzed.
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