Patent ID: 8681421
Filing Date: 2014-03-25
Classification: G02B,H01S

Abstract:
1. An IR laser source providing light in the IR spectrum, the laser source comprising: a pump laser operating at a frequency equivalent to wavelength shorter than 2 μm and at a predetermined power, and having a wavelength tuning range; and an optic fiber coupled to the pump laser, the optic fiber including at least a cascade of one or more sections of a hollow core photonic crystal fiber, each section of hollow core photonic crystal fiber having at least a passband in the IR spectrum and being filled with a molecular gas for triggering at least one Stoke's shift in light entering each said section of hollow core photonic crystal fiber for the particular power of the pump laser, the at least one Stoke's shift causing the light entering each section of hollow core photonic crystal silica fiber to shift in frequency into the passband in the IR spectrum of the hollow core photonic crystal fiber, wherein said passband of said number of sections of hollow core photonic crystal fiber includes wavelengths in the IR spectrum which are at least selectively between about 1.9 and about 2.2 μm, or between about 5.0 and about 7.5 μm or between about 8.1 and about 14.0 μm depending upon said number of sections of said hollow core photonic crystal fiber pumped by said pump laser.