EP 1198727 A1 20020424 - OPTICAL FIBER DIFFUSER
Title (en)
OPTICAL FIBER DIFFUSER
Title (de)
FASEROPTISCHER LICHTSTREUER
Title (fr)
DIFFUSEUR A FIBRE OPTIQUE
Publication
Application
Priority
- CA 0000733 W 20000616
- US 33574499 A 19990618
- US 51743300 A 20000302
Abstract (en)
[origin: WO0079319A1] Optical fiber diffusers for emitting light cylindrically along a length of the fiber diffuser (38) with preselected light intensity distributions along the length of the diffuser. The diffuser portion is defined by forming a distribution of scattering centers in a section of the optical fiber core (34) having a modulated index of refraction which acts to couple light radially out of the fiber along the diffuser section. The intensity distribution of light coupled out of the diffuser section of the fiber is controlled by controlling the profile of the modulated index of refraction, namely the coupling coefficient, along the length of the grating. Writing a grating into a multimode fiber provides a method of monitoring transmission in the fiber since some of the light can be coupled out and detected and interrogated. The diffuser devices can be used as sensors, since they also couple light incident on the diffuser into the core where it is transmitted to a detector.
IPC 1-7
IPC 8 full level
F21V 8/00 (2006.01); G02B 6/02 (2006.01); G02B 6/24 (2006.01); G02B 6/28 (2006.01)
CPC (source: EP)
G02B 6/0008 (2013.01); G02B 6/001 (2013.01); G02B 6/02 (2013.01); G02B 6/02052 (2013.01); G02B 6/02142 (2013.01); G02B 6/241 (2013.01); G02B 6/2817 (2013.01)
Citation (search report)
See references of WO 0079319A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0079319 A1 20001228; AU 5383900 A 20010109; CA 2375267 A1 20001228; EP 1198727 A1 20020424
DOCDB simple family (application)
CA 0000733 W 20000616; AU 5383900 A 20000616; CA 2375267 A 20000616; EP 00938428 A 20000616