Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Feedback Stabilization of Optical Interferometer.

R. H. Nakat

Published Feb 1, 1985• 0 citations
OpenAlex

Abstract

An experimental study was carried out on the performance of a feedback stabilization scheme for optical interferometers. Optical interferometers are susceptible to acoustic noise which translates into path length fluctuations in the interferometer arms. These fluctuations induce phase noise, resulting in amplitude fluctuations on the interferometer output. The experiment was performed on a Mach-Zehnder homodyne interferometer where a RMS noise reduction of 23 dB was observed. The stabilization scheme has application to other interferometer configurations. In the future, it will be applied to stabilize cavities used in the squeezed state generation of light. (Author)

Related papers

Noise-suppressing and lock-free optical interferometer for cold atom experiments

Xiao-Xiao Ma, Xian Zhang, Kaikai Huang +1 more

A novel noise-suppressing and lock-free interferometer is proposed and experimentally demonstrated in the study of the quantum non-destructive (QND) interaction of cold atoms. A QND measurement based on far-off resonant dispersive probing is usually carried out by a Mach-Zehnder type interferometer. It is an experimental challenge in its own right to reduce the classical noise, such as acoustic noise, phase noise and amplitude noise of lasers, and to lock the interferometer at the white-light position that corresponds to a nearly zero path-length difference. Here, we report an interferometer with an inserted acousto-optic modulator (AOM). It is noise immune and lock-free in principle. The experiments show that the new interferometer is able to measure cold atoms for more than 30 minutes and reduce the phase noise by about 30 dB.

Optics Express•Aug 28, 2020•2 citations

Stabilization of a long-armed fiber-optic single-photon interferometer

Seok-Beom Cho, Tae-Gon Noh

We report on single-photon interference experiments in a Michelson-type interferometer built with two 6-km-long fiber spools, as well as on the active stabilization of the interferometer. A weak coherent light signal was (de-) multiplexed with a strong reference light using wavelength-division multiplexing technique, and real-time feedback control technique was applied for the reference light to actively stabilize the phase fluctuation in the long-armed fiber interferometer. The stabilized interferometer showed phase stability of 0.06 rad, which corresponds to an optical path length fluctuation of 15 nm between the 6-km-long interfering arms. The raw visibility obtained without subtracting noise counts in the single-photon interference experiment was more than 98% for stabilized conditions.

Optics Express•Oct 7, 2009•54 citations

Soliton squeezing in a Mach-Zehnder fiber interferometer

Marco Fiorentino B, Jay E. Sharping, Prem Kumar +2 more

A scheme for generating amplitude squeezed light by means of soliton self-phase modulation is experimentally demonstrated. By injecting 180-fs pulses into an equivalent Mach-Zehnder fiber interferometer, a maximum noise reduction of $4.4\ifmmode\pm\else\textpm\fi{}0.3$ dB is obtained $(6.3\ifmmode\pm\else\textpm\fi{}0.6$ dB when corrected for losses). The dependence of noise reduction on the interferometer splitting ratio and fiber length is studied in detail.

arXiv:quant-ph/0106102•Physical Review A•Aug 3, 2001•48 citations

Adaptive-Step Perturb-and-Observe Algorithm for Multidimensional Phase Noise Stabilization in Fiber-Based Multi-Arm Mach–Zehnder Interferometers

H. Abarzúa, C. Melo, Silvia Restrepo +6 more

Fiber-optic Mach-Zehnder interferometers are widely used in research areas such as telecommunications, spectroscopy, and quantum information. These optical structures are known to be affected by phase fluctuations that are usually modeled as multiparametric noise.This multidimensional noise must be stabilized or compensated for to enable fiber-optic Mach-Zehnder architectures for practical applications. In this work, we study the effectiveness of a modified Perturb-and-Observe (P&O) algorithm to control multidimensional phase noise in fiber-based multi-arm Mach-Zehnder interferometers. We demonstrate the feasibility of stabilizing multidimensional phase noise by numerical simulations using a simple feedback control scheme and analyze the algorithm’s performance for systems up to dimension 8x8. We achieved minimal steady-state errors that guarantee high optical visibility in complex optical systems with N×N matrices (with N=[2,3,4,5,6,7,8]).

Algorithms•Nov 21, 2024•3 citations

Efficient Suppression of Laser Excess Noises for Quantum Optomechanical System

Xinya Zhang

The suppression of laser excess noise using a cascaded imbalanced Mach-Zehnder interferometer with fiber optic components was proposed and demonstrated in the experiment.By developing an automatic phase control system,the phase of the fiber interferometer with a large path imbalance(127m)can be stabilized in a long term,and the laser excess noise around 800 kHz and its integer multiples can be efficiently suppressed by more than 45 dB.The effective frequency bands of the noise filter can be controlled by adjusting the arm-length difference of the interferometer.The approach provides an effective solution for achieving compact and cost-effective laser noise reduction,and can be applied directly to the quantum optomechanical system where shot-noise-limited laser can be required.

ACTA PHOTONICA SINICA•Jan 1, 2015•0 citations

Optical Squeezing with Self-Phase-Stabilized Scheme

Masataka Shirasaki, Christopher Richard Doerr, K. Bergman +1 more

A nonlinear symmetric Mach-Zehnder interferometer was proposed for optical squeezing1,2, and it was shown that a nonlinear ring reflector with optical pulses is a practical realization of this squeezer2 (see Fig.1). Noise suppression in a balanced homodyne detection using this squeezing scheme was observed experimentally3,4.

Nonlinear Optics•Jan 1, 1992•0 citations
An experimental study was carried out on the performance of a feedback stabilization scheme for optical interferometers. Optical interferometers are susceptible to acoustic noise which translates into path length fluctuations in the interferometer arms. These fluctuations induce phase noise, resulting in amplitude fluctuations on the interferometer output. The experiment was performed on a Mach-Zehnder homodyne interferometer where a RMS noise reduction of 23 dB was observed. The stabilization scheme has application to other interferometer configurations. In the future, it will be applied to stabilize cavities used in the squeezed state generation of light. (Author)
A novel noise-suppressing and lock-free interferometer is proposed and experimentally demonstrated in the study of the quantum non-destructive (QND) interaction of cold atoms. A QND measurement based on far-off resonant dispersive probing is usually carried out by a Mach-Zehnder type interferometer. It is an experimental challenge in its own right to reduce the classical noise, such as acoustic noise, phase noise and amplitude noise of lasers, and to lock the interferometer at the white-light position that corresponds to a nearly zero path-length difference. Here, we report an interferometer with an inserted acousto-optic modulator (AOM). It is noise immune and lock-free in principle. The experiments show that the new interferometer is able to measure cold atoms for more than 30 minutes and reduce the phase noise by about 30 dB.
We report on single-photon interference experiments in a Michelson-type interferometer built with two 6-km-long fiber spools, as well as on the active stabilization of the interferometer. A weak coherent light signal was (de-) multiplexed with a strong reference light using wavelength-division multiplexing technique, and real-time feedback control technique was applied for the reference light to actively stabilize the phase fluctuation in the long-armed fiber interferometer. The stabilized interferometer showed phase stability of 0.06 rad, which corresponds to an optical path length fluctuation of 15 nm between the 6-km-long interfering arms. The raw visibility obtained without subtracting noise counts in the single-photon interference experiment was more than 98% for stabilized conditions.
Fiber-optic Mach-Zehnder interferometers are widely used in research areas such as telecommunications, spectroscopy, and quantum information. These optical structures are known to be affected by phase fluctuations that are usually modeled as multiparametric noise.This multidimensional noise must be stabilized or compensated for to enable fiber-optic Mach-Zehnder architectures for practical applications. In this work, we study the effectiveness of a modified Perturb-and-Observe (P&O) algorithm to control multidimensional phase noise in fiber-based multi-arm Mach-Zehnder interferometers. We demonstrate the feasibility of stabilizing multidimensional phase noise by numerical simulations using a simple feedback control scheme and analyze the algorithm’s performance for systems up to dimension 8x8. We achieved minimal steady-state errors that guarantee high optical visibility in complex optical systems with N×N matrices (with N=[2,3,4,5,6,7,8]).
The suppression of laser excess noise using a cascaded imbalanced Mach-Zehnder interferometer with fiber optic components was proposed and demonstrated in the experiment.By developing an automatic phase control system,the phase of the fiber interferometer with a large path imbalance(127m)can be stabilized in a long term,and the laser excess noise around 800 kHz and its integer multiples can be efficiently suppressed by more than 45 dB.The effective frequency bands of the noise filter can be controlled by adjusting the arm-length difference of the interferometer.The approach provides an effective solution for achieving compact and cost-effective laser noise reduction,and can be applied directly to the quantum optomechanical system where shot-noise-limited laser can be required.