Abstract
A novel diffusion double-ended bonded structure (DEBS) consisting of F2 glass, Er3+/Yb3+: glass and Co2+:MgAl2O4 was reported, for human eye-safety micro-ranging lasers. Compared with single-ended bonding structure (SEBS) and single glass structure (SGS) by the thermal analysis, its thermal focal length increased by 53.8% over the latter two. It was noted that the DEBS could effectively reduce the thermal effect of the gain medium. Under the identical experimental conditions, the DEBS’s laser performance characteristics were significantly better than the other two. The peak power and laser stability of the DEBS could be dramatically improved more 45.4% and 100%, respectively. Finally, the DEBS laser delivered 340 μJ pulse energy with 10 Hz repetition rate, 5.5 ns pulse duration and 1.4 of beam quality factors M2. Such an eye-safe compact laser can be applied in ranging systems, such as drones and low-altitude missiles.
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