Improvement on spectrum of high power diode laser array
Stabilization and spectrum narrowing of the emission wavelength of high-power diode laser array is demonstrated by a volume Bragg grating(VBG) resonator.The spectral full width half maximum of the output emission was suppressed by VBG cavity from 1.7 nm to 0.4 nm,and the emission wavelength of VBG-locked diode laser array varied slightly with variation of output power and heat sink temperature.Output power of 15.12 W is achieved from VBG-locked diode laser array with a loss of approximately 2% when the injection current is 35 A.