Invention Grant
- Patent Title: Coiled evanescent optical sensor
- Patent Title (中): 卷绕渐逝光学传感器
-
Application No.: US12853710Application Date: 2010-08-10
-
Publication No.: US08368899B2Publication Date: 2013-02-05
- Inventor: Mikhail Sumetsky
- Applicant: Mikhail Sumetsky
- Applicant Address: US GA Norcross
- Assignee: OFS Fitel, LLC
- Current Assignee: OFS Fitel, LLC
- Current Assignee Address: US GA Norcross
- Agent Wendy W. Koba, Esq.
- Main IPC: G01B9/02
- IPC: G01B9/02

Abstract:
An evanescent optical sensor is formed as a coil of either optical fiber or microfiber. By coiling the fiber/microfiber, the overall size of the sensor is significantly reduced when compared to “straight path” fiber sensors, yet exhibits a similar degree of sensitivity. An optical signal is coupled into a fiber coil that has been immersed in an ambient to be analyzed. The use of a coil configuration results in creating a plurality of whispering gallery modes (WGMs) that will propagate along the coil by reflecting from the surface of the curved fiber/microfiber forming the coil. The interference between these modes will be modified as a function of the properties of the ambient environment. Environmental changes cause variations in the optical length of the coil as “seen” by the various modes, and the interference of the modes is analyzed by studying the transmission spectrum at the output of the coil.
Public/Granted literature
- US20110043818A1 Coiled Evanescent Optical Sensor Public/Granted day:2011-02-24
Information query