Materials, Photonic Devices, and Sensors

Fiber Bragg grating sensing system using a TO-can–based compact optical module for wavelength demodulation

[+] Author Affiliations
Hong Joo Song

Korea Electronics Technology Institute, Photonics Convergence Research Center, 25, Saenari-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-816, Republic of Korea

Korea University, School of Electrical Engineering, 145, Anam-ro, Seongbuk-gu, Seoul 136-701, Republic ofKorea

Jun Ho Lee, Cheong Hyun Roh, Cheol-Koo Hahn

Korea Electronics Technology Institute, Photonics Convergence Research Center, 25, Saenari-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-816, Republic of Korea

Young Bok Choi

Fiberpia Co., Ltd., 702, Tamnip-dong, Yuseong-gu, Daejeon 305-510, Republic of Korea

Jeong Soo Kim

Phovel, 167-12, Techno 2ro, Yongsan-dong, Yuseong-gu, Daejeon 305-500, Republic of Korea

Jung Ho Park

Korea University, School of Electrical Engineering, 145, Anam-ro, Seongbuk-gu, Seoul 136-701, Republic ofKorea

Opt. Eng. 54(12), 127106 (Dec 22, 2015). doi:10.1117/1.OE.54.12.127106
History: Received September 22, 2015; Accepted November 19, 2015
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Abstract.  A combined scheme using the light source of a reflective semiconductor optical amplifier (RSOA) and an optical signal processing unit (OSPU) based on the compact TO-can package is fabricated and characterized for a fiber Bragg grating (FBG) sensing system. Due to the optical feedback behavior from the FBG sensor, the RSOA is self-injection locked and lasing occurs at the Bragg wavelength. Using the wavelength-dependent filter method, all of the components in the OSPU are compactly integrated on the TO-can package with a height of 17.6 mm and diameter of 6.0 mm. The wavelength demodulating output signals are based on the optical power difference, depending only on the wavelengths without the effect of input optical power variations. The sensitivity of the output signal to temperature shows 0.026dB/°C. The entire FBG sensing system has an excellent linear response to temperatures controlled with an accuracy of ±0.3°C.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Hong Joo Song ; Jun Ho Lee ; Cheong Hyun Roh ; Cheol-Koo Hahn ; Young Bok Choi, et al.
"Fiber Bragg grating sensing system using a TO-can–based compact optical module for wavelength demodulation", Opt. Eng. 54(12), 127106 (Dec 22, 2015). ; http://dx.doi.org/10.1117/1.OE.54.12.127106


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