FIBER OPTIC CONDUCTOR FOR OPTICAL INTENSIFICATION OF RADIATION AT WAVELENGTHS RANGING BETWEEN 1000 AND 1700 NM, METHODS FOR ITS MANUFACTURE, AND FIBER LASER Russian patent published in 2007 - IPC H01S3/67 G02B6/00 C03C13/04 

FIELD: laser engineering and fiber optics.

SUBSTANCE: proposed fiber optic conductor designed for intensifying radiation at wavelength ranging between 1000 and 1700 nm has oxide glass core and oxide glass shell. Core incorporates bismuth oxide as well as elements of group including silicon, germanium, phosphor, aluminum, and gallium. Fiber optic conductor affords luminescence in range of 1000 to 1700 nm when excited by beams with wavelengths ranging between 750 and 1200 nm, luminescence bandwidth being at half of height over 120 nm. Proposed method for manufacturing fiber optic conductor includes production of optical conductor blank and core. Oxygen and pair of chlorides of elements chosen from above-mentioned group are passed through quartz glass tube. The latter is compressed to produce blank in the form of solid bar. Pairs of bismuth chlorides are also passed through tube together with chlorides. Proposed fiber laser has fiber optic conductor, pumping source, device for beam entry in fiber optic conductor, resonator, and device for removing generated beam from resonator.

EFFECT: enhanced intensifying bandwidth and its efficiency, reduced concentration of unwanted impurities ensured by proposed method, enlarged laser tuning wavelength range.

20 cl, 6 dwg