All-fiber gas Raman laser at 1 μm

Here, we report a pulsed 1135 nm all-fiber gas Raman laser based on hydrogen-filled hollow-core photonic crystal fibers (HC-PCFs). A high-pressure all-fiber gas cavity is fabricated by fusion splicing HC-PCF and solid-core fibers. Pumped with a nanosecond 1064 nm fiber amplifier, 1135 nm Stokes wave is generated by rotational stimulated Raman scattering of hydrogen molecules.