Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/36188
Title: In-fiber modal interferometer formed by offset-splicing in air-core photonic bandgap fiber
Authors: Yu, XJ
Ju, J
Zhang, JT
Liu, SC
Jin, W 
Keywords: Photonic bandgap fiber
Air-core fiber
In-fiber interferometer
Offset splicing'
Issue Date: 2014
Publisher: North-Holland
Source: Optics communications, 2014, v. 323, p. 143-147 How to cite?
Journal: Optics communications 
Abstract: We present a compact in fiber Mach-Zehnder interferometer (MZI) formed by an offset splicing technique in air-core photonic bandgap fiber (PBF). The MZI is implemented by using two cascaded offset-splicing joints which act as beam splitter and combiner. The influences of lateral offset amount and interferometer length on the performance of MZIs were investigated experimentally. Several in-fiber MZIs with different interferometer lengths were built and it is found that the interference dip wavelength spacing is inversely proportional to the interferometer length. The MZI relies on the interference occurring between the fundamental core mode (FCM) and a surface mode (SM) of the PBF. The potential applications of the proposed in-fiber MZl were further investigated as temperature and strain sensors. The temperature and longitudinal strain sensitivities of the MZl were measured to be 211.89 pm/( degrees C m) and 0.6 pm/mu epsilon. respectively.
URI: http://hdl.handle.net/10397/36188
ISSN: 0030-4018
EISSN: 1873-0310
DOI: 10.1016/j.optcom.2014.02.065
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