Affiliation:
1. Hebei University
2. NuVision Photonics, Inc.
Abstract
V-grooves are critical components for attaching fiber pigtails to photonics integrated circuits and for holding fibers in optical devices. Improper choice of V-groove angles and clamping method may cause large birefringence in the fibers and degrade polarization related performance of the devices. In this paper, we theoretically analyze the clamping-force induced birefringence of a single-mode (SM) fiber clamped in a V-groove by a flat-lid or by two identical V-grooves, respectively. We build a distributed polarization analyzer with complete Muller matrix analysis capability, which enables us to accurately measure local birefringence values in the fiber induced by clamped V-grooves of different angles. We find that for a SM fiber clamped in a commercial V-groove made with ZrO2 or SiO2 by a flat-lid, the zero-birefringence (ZB) angle is almost exactly 60°, suggesting that the friction coefficient in the V-groove can be safely ignored. In contrast, previous studies either indicated that the ZB V-groove angles clamped by a flat-lid never existed or significantly deviated from 60° due to the friction coefficient. More importantly, we also find, for the first time, both theoretically and experimentally, that a SM fiber clamped by two identical commercial V-grooves has a ZB when the V-groove angle is 90°. The methods and results reported in this paper shall prove beneficial for the fiber optic component industry to optimize polarization related performances of devices for sensing, communication, and instrumentation applications.
Funder
National Natural Science Foundation of China
Hebei Provincial Natural Science Foundation for Outstanding Young Scholars
Funding of Hebei “333 talent project”
Hebei Provincial Innovation Ability Promotion Project
Research Start-up Foundation of High-Level Talents Introduction
Internal R&D funding of NuVision Photonics
Subject
Atomic and Molecular Physics, and Optics
Cited by
3 articles.
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