scholarly journals Multiplexed Weak Waist-Enlarged Fiber Taper Curvature Sensor and Its Rapid Inline Fabrication

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6782
Author(s):  
Duo Yi ◽  
Lina Wang ◽  
Youfu Geng ◽  
Yu Du ◽  
Xuejin Li ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fabrication Method ◽  
Curvature Sensing ◽  
Fiber Taper ◽  
Rapid Fabrication ◽  
Vector Curvature ◽  
Curvature Sensor

This study proposes a multiplexed weak waist-enlarged fiber taper (WWFT) curvature sensor and its rapid fabrication method. Compared with other types of fiber taper, the proposed WWFT has no difference in appearance with the single mode fiber and has ultralow insertion loss. The fabrication of WWFT also does not need the repeated cleaving and splicing process, and thereby could be rapidly embedded into the inline sensing fiber without splicing point, which greatly enhances the sensor solidity. Owing to the ultralow insertion loss (as low as 0.15 dB), the WWFT-based interferometer is further used for multiplexed curvature sensing. The results show that the different curvatures can be individually detected by the multiplexed interferometers. Furthermore, it also shows that diverse responses for the curvature changes exist in two orthogonal directions, and the corresponding sensitivities are determined to be 79.1°/m−1 and –48.0°/m−1 respectively. This feature can be potentially applied for vector curvature sensing.

Performance and Reliability of a MEMS-based tunable optical filter operating in the 1565 nm-1525 nm wavelength range

2002 ◽  
Vol 722 ◽  
Author(s):  
T. S. Sriram ◽  
B. Strauss ◽  
S. Pappas ◽  
A. Baliga ◽  
A. Jean ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Line Width ◽  
Insertion Loss ◽  
Optical Filter ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Reliability Testing ◽  
Silicon Nitride Membrane ◽  
Tunable Optical Filter ◽  
Extensive Performance

AbstractThis paper describes the results of extensive performance and reliability characterization of a silicon-based surface micro-machined tunable optical filter. The device comprises a high-finesse Fabry-Perot etalon with one flat and one curved dielectric mirror. The curved mirror is mounted on an electrostatically actuated silicon nitride membrane tethered to the substrate using silicon nitride posts. A voltage applied to the membrane allows the device to be tuned by adjusting the length of the cavity. The device is coupled optically to an input and an output single mode fiber inside a hermetic package. Extensive performance characterization (over operating temperature range) was performed on the packaged device. Parameters characterized included tuning characteristics, insertion loss, filter line-width and side mode suppression ratio. Reliability testing was performed by subjecting the MEMS structure to a very large number of actuations at an elevated temperature both inside the package and on a test board. The MEMS structure was found to be extremely robust, running trillions of actuations without failures. Package level reliability testing conforming to Telcordia standards indicated that key device parameters including insertion loss, filter line-width and tuning characteristics did not change measurably over the duration of the test.

scholarly journals Fabrication of Multimode-Single Mode Polymer Fiber Tweezers for Single Cell Trapping and Identification with Improved Performance

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2746 ◽  
Author(s):  
Sandra Rodrigues ◽  
Joana Paiva ◽  
Rita Ribeiro ◽  
Olivier Soppera ◽  
João Cunha ◽  
...  
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Physical Contact ◽  
Scattered Signal ◽  
Fabrication Method ◽  
Cell Trapping ◽  
Low Degree ◽  
Single Cell Trapping ◽  
Improved Performance ◽  
Multi Mode

Optical fiber tweezers have been gaining prominence in several applications in Biology and Medicine. Due to their outstanding focusing abilities, they are able to trap and manipulate microparticles, including cells, needing any physical contact and with a low degree of invasiveness to the trapped cell. Recently, we proposed a fiber tweezer configuration based on a polymeric micro-lens on the top of a single mode fiber, obtained by a self-guided photopolymerization process. This configuration is able to both trap and identify the target through the analysis of short-term portions of the back-scattered signal. In this paper, we propose a variant of this fabrication method, capable of producing more robust fiber tips, which produce stronger trapping effects on targets by as much as two to ten fold. These novel lenses maintain the capability of distinguish the different classes of trapped particles based on the back-scattered signal. This novel fabrication method consists in the introduction of a multi mode fiber section on the tip of a single mode (SM) fiber. A detailed description of how relevant fabrication parameters such as the length of the multi mode section and the photopolymerization laser power can be tuned for different purposes (e.g., microparticles trapping only, simultaneous trapping and sensing) is also provided, based on both experimental and theoretical evidences.

Curvature sensor based on two cascading abrupt-tapers modal interferometer in single mode fiber

2014 ◽  
Vol 333 ◽  
pp. 11-15 ◽  
Author(s):  
Luo Niu ◽  
Chun-Liu Zhao ◽  
Huaping Gong ◽  
Yi Li ◽  
Shangzhong Jin
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Curvature Sensor

A Highly Accurate Curvature Sensor Based on a Rough Side-Polished Single-Mode Fiber

2020 ◽  
Vol 40 (14) ◽  
pp. 1406004
Author(s):  
杨洋 Yang Yang ◽  
朱肖彤 Zhu Xiaotong ◽  
闫良俊 Yan Liangjun ◽  
陈旭泽 Cheney Xuze ◽  
宋章启 Song Zhangqi
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Curvature Sensor

scholarly journals Adaptable Optical Fiber Displacement-Curvature Sensor Based on a Modal Michelson Interferometer with a Tapered Single Mode Fiber

Sensors ◽  
2017 ◽  
Vol 17 (6) ◽  
pp. 1259 ◽  
Author(s):  
G. Salceda-Delgado ◽  
A. Martinez-Rios ◽  
R. Selvas-Aguilar ◽  
R. Álvarez-Tamayo ◽  
A. Castillo-Guzman ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Curvature Sensor

scholarly journals Reproducible fabrication method for polarization preserving single-mode fiber couplers

1988 ◽  
Vol 6 (7) ◽  
pp. 1191-1198 ◽  
Author(s):  
M. Abebe ◽  
C.A. Villarruel ◽  
W.K. Burns
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Fabrication Method
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