We have developed a single mode fiber-light source at 1.8um band, which composes of thulium (Tm)-doped silica fiber and optical devices used in telecommunication fields. This laser can be operated as a laser and broadband light source selectively. The laser wavelength is tuned from 1765nm to 1812nm by adjusting an angle of a built-in band pass filter (BPF). A maximum output power is 115mW at 1812nm, in the case that pump power is 363mW. The broadband light source has a maximum power of 10mW, the peak wavelength of 1840nm and the full width at half maximum of 50nm. By using these light sources, we have succeeded in obtaining images of test target by observing reflected light through opaque liquid.

Date Published: 7 February 2008
PDF: 8 pages
Proc. SPIE 6852, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII, 68520I (7 February 2008); doi: 10.1117/12.762773

Published in SPIE Proceedings Vol. 6852:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII
Israel Gannot, Editor(s)