Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Study of a fiber spectrometer based on offset fusion

Not Accessible

Your library or personal account may give you access

Abstract

A near-infrared spectrometer based on offset fused multimode fiber (MMF) is investigated in this study. The light spectrum is recovered by analyzing the speckle images when light is passing through the MMF. In order to generate adequate speckles, a polarization maintaining fiber (PMF) and a 30 cm long MMF are fused with a vertical offset. Seven different offset displacements are implemented in the fiber fusion. The follow-up experiments show that the fiber offset fusion has a significant influence on the spectral correlation and the resolution. Larger offset fusion can excite more high-order modes in the MMF, and it greatly improves the spectrometer’s performance. The simulation results also show that more modes are excited in MMF, and the increase of mode number leads to lower correlation coefficients of the neighboring spectral channels. However, large offset fusion increases the fusion and the insertion loss of the whole system, which may bring difficulties in the low-light cases. In addition, an image denoising algorithm based on dynamic threshold filtering and a spectral reconstruction algorithm originated from complete orthogonal decomposition were used to remove the speckle pattern noise and recover the spectrum. The final speckle-based spectrometer has a spectral resolution of ${0.6} \sim 0.016\;{\rm nm}$ depending on the different offset fusions.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Speckle wavemeter based on a multi-core fiber and compressive imaging

Huan Liu, Haole Kong, Jiajun He, Yanqing Qiu, Bangning Mao, Yanlong Meng, Yanghui Li, Juan Kang, Le Wang, and Yi Li
Appl. Opt. 63(3) 846-852 (2024)

All-fiber spectrometer based on speckle pattern reconstruction

Brandon Redding, Sebastien M. Popoff, and Hui Cao
Opt. Express 21(5) 6584-6600 (2013)

Noise analysis of spectrometers based on speckle pattern reconstruction

Brandon Redding, Sebastien M. Popoff, Yaron Bromberg, Michael A. Choma, and Hui Cao
Appl. Opt. 53(3) 410-417 (2014)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (9)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved