title: Nested fiber ring resonator enhanced Mach-Zehnder interferometer for temperature sensing.
abstract: We numerically investigate the properties of the nested fiber ring resonator coupled Mach-Zehnder interferometer as a sensor. By introducing the phase bias of 0.5π in the reference arm, the two output intensities exhibit sharp asymmetric line shapes around the resonance wavelength. Utilizing the intensity interrogation, we analyze the effect of parameters on the sensitivity and the detection limit. For the 30 dB signal-noise system, the sensitivity and the detection limit can achieve 4.0866/°C and 7.341×10(-3)°C, respectively; the results indicate that this structure is suitable for high-sensitivity measurements.
authors.affiliation: National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin, China.
authors.forename: Changqiu
authors.initials: C
authors.lastname: Yu
authors.forename: Yundong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xuenan
authors.initials: X
authors.lastname: Zhang
authors.forename: Kaiyang
authors.initials: K
authors.lastname: Wang
authors.forename: Chengbao
authors.initials: C
authors.lastname: Yao
authors.forename: Ping
authors.initials: P
authors.lastname: Yuan
authors.forename: Yudong
authors.initials: Y
authors.lastname: Guan