Affiliation:
1. Tsinghua Shenzhen International Graduate School & Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University
2. School of Electronic and Computer Engineering, Peking University
Abstract
In this paper, we propose and
experimentally demonstrate a sensitivity-enhanced temperature sensor
by cascading two non-adiabatic tapered fibers (NATFs) based on the
Vernier effect. In addition, we investigate the influence of the
presence of the reference arm on the cascaded NATFs and compare the
temperature response. The
experimental results show that a cascaded NATF configuration in which
one NATF acts as a sensing arm and the other acts as a reference arm,
achieves a temperature sensitivity of
−
917
p
m
/
∘
C
, which is 13.28 times that of the
single NATF (
−
69
p
m
/
∘
C
), while a cascaded NATF configuration
in which both NATFs act as a sensing arm attains a temperature
sensitivity of 440 pm/°C, which is lower than the configuration
with a reference arm. It is confirmed that the synchronous change of
the two interferometers will reduce the sensing sensitivity of Vernier
effect-based sensors by theory and experiments, and provides guidance
for the design of Vernier effect-based sensors.
Funder
Shenzhen Fundamental Research
Program
Science, Technology and Innovation
Commission of Shenzhen Municipality
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
2 articles.
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