Journal ArticleDOI
Multimode interference devices with single-mode–multimode–multimode fiber structure
Nitin Bhatia,Joseph John +1 more
TLDR
A detailed physical understanding of the transmission properties, and the differences from the SMS structure, is presented, which can be used to reduce the number of modes in high-speed MMF applications using an all-fiber structure instead of bulk optics.Abstract:
We present a single-mode–multimode–multimode (SMm) fiber structure with a few interesting device applications. Unlike the single-mode–multimode–single-mode (SMS) structure, SMm has the unique feature of more than one mode in the output fiber. A detailed physical understanding of the transmission properties, and the differences from the SMS structure, is presented. The device can be used to excite selected modes in the output multimode fiber (MMF). This can be used to reduce the number of modes in high-speed MMF applications using an all-fiber structure instead of bulk optics. In yet another possible application, we show a way of designing sensitive refractive index sensors for measurement in different RI ranges.read more
Citations
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Journal ArticleDOI
Singlemode-Multimode-Singlemode Fiber Structures for Sensing Applications—A Review
Qiang Wu,Yuwei Qu,Juan Liu,Jinhui Yuan,Shengpeng Wan,Tao Wu,Xingdao He,Bin Liu,Dejun Liu,Youqiao Ma,Yuliya Semenova,Pengfei Wang,Xiangjun Xin,Gerald Farrell +13 more
TL;DR: A singlemode-multimode-singlemode (SMS) fiber structure consists of a short section of multimode fiber fusion-spliced between two SMS fibers as mentioned in this paper.
Journal ArticleDOI
All-fiber passively mode-locked laser using nonlinear multimode interference of step-index multimode fiber
TL;DR: In this article, an all-fiber passively mode-locked laser operation based on the nonlinear multimode interference of step-index multimode fiber was demonstrated. But the authors did not investigate the influence of total cavity dispersion on the optical spectrum, pulse width, and output power.
Journal ArticleDOI
A label-free fiber optic biosensor for Salmonella Typhimurium detection
Siddharth Kaushik,Siddharth Kaushik,Amit Pandey,Amit Pandey,Umesh Tiwari,Umesh Tiwari,Ravindra Kumar Sinha,Ravindra Kumar Sinha +7 more
TL;DR: In this paper, a label-free fiber optic biosensor based on single mode-tapered multimode-single mode (SMS) structure for bacteria detection has been reported.
Journal ArticleDOI
Refractive Index Sensor Based on Double Side-Polished U-Shaped Plastic Optical Fiber.
TL;DR: A U-shaped double-side polished plastic optical fiber (POF) is demonstrated as a liquid refractive index (RI) sensor that has potentials in low-cost visible light intensity RI detection.
Journal ArticleDOI
Refractive Index Sensor Based on Twisted Tapered Plastic Optical Fibers
TL;DR: In this paper, a self-referencing sensor with two twisted tapered plastic optical fibers (POFs) was proposed, where the POFs were fabricated by a heating and drawing method and were twisted around each other to form a coupled structure.
References
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Journal ArticleDOI
Optical multi-mode interference devices based on self-imaging: principles and applications
LB Soldano,E.C.M. Pennings +1 more
TL;DR: The underlying self-imaging principle in multimode waveguides is described using a guided mode propagation analysis and it is shown that multimode interference couplers offer superior performance, excellent tolerance to polarization and wavelength variations, and relaxed fabrication requirements when compared to alternatives such as directional coupling.
Journal ArticleDOI
Wide-angle beam propagation using Pade approximant operators.
TL;DR: A new beam-propagation method is presented whereby the exact scalar Helmholtz propagation operator is replaced by any one of a sequence of higher-order Pade approximant operators, resulting in a matrix equation of bandwidth 2n + 1 that is solvable by using Standard implicit solution techniques.
Journal ArticleDOI
Wavelength tunable fiber lens based on multimode interference
TL;DR: In this paper, a fiber-based wavelength-tunable condensing lens is theoretically and experimentally investigated in terms of its ability to shift the longitudinal focus position as a function of wavelength.
Journal ArticleDOI
All-fiber multimode interference bandpass filter
TL;DR: A novel design for an all-fiber bandpass filter based on a multimode interference reimaging phenomenon that has achieved low insertion loss with adequate bandwidth and isolation for coarse wavelength-division multiplexing is presented.
Related Papers (5)
Single-mode-multimode-multimode device: sensitivity of the single mode to the fiber parameters and geometrical misalignments
Nitin Bhatia,Joseph John +1 more