Optical Sensor Interrogation with a Blazed Fiber Bragg Grating and a Charge-Coupled Device Linear Array
Applied Optics, Vol. 43, Issue 1, pp. 33-40 (2004)
http://dx.doi.org/10.1364/AO.43.000033
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Abstract
We present what is to our knowledge the first comprehensive investigation of the use of blazed fiber Bragg gratings (BFBGs) to interrogate wavelength division multiplexed (WDM) in-fiber optical sensor arrays. We show that the light outcoupled from the core of these BFBGs is radiated with sufficient optical power that it may be detected with a low-cost charge-coupled device (CCD) array. We present thorough system performance analysis that shows sufficient spectral-spatial resolution to decode sensors with a WDM separation of 75 ρm, signal-to-noise ratio greater than 45-dB bandwidth of 70 nm, and drift of only 0.1 ρm. We show the system to be polarization-state insensitive, making the BFBG-CCD spectral analysis technique a practical, extremely low-cost, alternative to traditional tunable filter approaches.
© 2004 Optical Society of America
OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.2770) Diffraction and gratings : Gratings
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
Citation
Alexander G. Simpson, Kaiming Zhou, Lin Zhang, Lorna Everall, and Ian Bennion, "Optical Sensor Interrogation with a Blazed Fiber Bragg Grating and a Charge-Coupled Device Linear Array," Appl. Opt. 43, 33-40 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-1-33
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