Reduction of Intensity Noise in Hollow Core Optical Fiber Using Angle-Cleaved Splices

When spliced to solid core optical fiber, a hollow core optical fiber (HCF) exhibits multipath interference. Reflections at the air/glass interfaces add coherently in transmission, producing intensity fluctuations. This can lead to excess intensity noise at the output of a fiber segment. In this let...

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Bibliographic Details
Published in:IEEE photonics technology letters 2016-02, Vol.28 (4), p.414-417
Main Authors: Miller, Gary A., Cranch, Geoffrey A.
Format: Article
Language:English
Subjects:
Angle-cleaved fiber
Electron tubes
fusion splice
High cycle fatigue
hollow core optical fiber
Joints
multipath interference
Noise
Noise intensity
Noise levels
Noise reduction
Optical fiber polarization
Optical fiber sensors
Optical fibers
Optical losses
Reduction
relative intensity noise
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Summary:When spliced to solid core optical fiber, a hollow core optical fiber (HCF) exhibits multipath interference. Reflections at the air/glass interfaces add coherently in transmission, producing intensity fluctuations. This can lead to excess intensity noise at the output of a fiber segment. In this letter, angle-cleaved splices were performed on HCFs to reduce this noise without significant alteration of the fiber's optical properties. Cleave angles ranging from 7° to 12° produced splices with return losses less than -50 dB and excess insertion losses typically around 1 or 2 dB. A 37-dB reduction in intensity noise over a flat-cleaved splice was achieved with negligible increase in higher order mode generation or polarization-dependent loss.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2496873