Mid infrared supercontinuum generation spanning 2.0 to 15.1 mm in a chalcogenide step index fiber.
We experimentally demonstrate mid infrared (MIR) supercontinuum (SC) generation spanning ~2.0 to 15.1 mm in a 3 cm long chalcogenide step index fiber. The pump source is generated by the difference frequency generation with a pulse width of ~170 fs, a repetition rate of ~1000 Hz, and a wavelength range tunable from 2.4 to 11 mm. To the best of our knowledge, this is the broadest MIR SC generation observed so far in optical fibers. It facilitates fiber based applications in sensing, medical, and biological imaging areas.
Optics letters