US 6,982,997 B1
Single-frequency narrow linewidth 1μm fiber laser
Shibin Jiang, Tucson, Ariz. (US); Yushi Kaneda, Tucson, Ariz. (US); Christine Speigelberg, Tucson, Ariz. (US); and Tao Luo, Tucson, Ariz. (US)
Assigned to NP Photonics, Inc., Tucson, Ariz. (US)
Filed on Sep. 16, 2003, as Appl. No. 10/665,032.
Int. Cl. H01S 3/30 (2006.01); H01S 3/08 (2006.01); H01S 3/98 (2006.01)
U.S. Cl. 372—6 21 Claims
OG exemplary drawing
 
1. A fiber laser, comprising:
A gain fiber less than 5 cm in length including,
A cladding formed from an oxide-based multi-component glass selected from phosphate, germanate, or tellurite; and
A core formed from the same glass doped with 0.5–30 wt. % ytterbium oxide;
A narrowband grating at one end of the fiber;
A broadband grating at the other end of the fiber; and
A source of pump radiation that illuminates the fiber so that the ytterbium oxide ions lase at a single longitudinal mode and said fiber outputs a single-mode signal having a center wavelength between approximately 0.98 μm and 1.08 μm with a linewidth less than 10 kHz.