Spectral filtering in a diode-pumped Nd:YLF regenerative amplifier using a volume Bragg grating.
Instrument-limited suppression of out-of-band Amplified Spontaneous Emission (ASE) is demonstrated in a Nd:YLF Diode-Pumped Regenerative Amplifier (DPRA) using a Volume Bragg Grating (VBG) as a spectrally selective reflective element. A VBG with 99.4% diffraction efficiency and 230-pm-FWHM reflection bandwidth produced a 43-pm- FWHM output spectral width in an unseeded DPRA compared to 150-pm FWHM in the same DPRA with no VBG. Instrument-limited ASE suppression is even observed when the DPRA seed pulse energy approaches the ASE background.
Okishev
Andrey V
AV
Dorrer
Christophe
C
Smirnov
Vadim I
VI
Glebov
Leonid B
LB
Zuegel
Jonathan D
JD