Abstract: A compact thermometer based on a broadband microfiber coupler tip is demonstrated in
this paper. The thermometer can measure a broad temperature range from room temperature to
1283ºC. This is the highest temperature measured with a silica optical fiber device. An average
sensitivity of 11.96pm/ºC was achieved for a coupler tip diameter of ~3 μm.
OCIS codes: (060.2370) Fiber optics sensors; (060.1810) Buffers, couplers, routers, switches, and multiplexers; (060.2340)
Fiber optics components; (230.1150) All-optical devices