1.

The thulium doped fiber laser when pumped with alexandrite laser output at 0.786 μm, the laser emits a?#

A. 0.6 μm
B. 0.8 μm
C. 2.3 μm
D. 1.2μm
Answer» B. 0.8 ‚âà√≠¬¨‚à´m


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