Guidelines for design and fabrication of fused fiber coupler based wavelength division multiplexings

The study proposed a temperature sensor based on distilled water cladding of the coupling region in the loop-fiber coupler, which was formed by folding a single-mode fiber, melting the taper region with an H 2 flame, and using two adjacent fibers to obtain the interference in the coupling. Based on thermo-optical effect response and coupling interference principle, with increasing ambient temperature, the refractive index of the distilled water decreased, and the interference spectrum drifted. The experiment explored the relationship between different lengths of taper region and interference spectrum. When the taper region length was 30-35 mm, the interference spectrum improved. Results showed that the maximum sensitivity of the sensor was 151.35 pm/°C and linearity reached 99.99% when the temperature was within the range of 35°C to 60°C. Furthermore, we propose a low-cost demodulation scheme. The sensor had high sensitivity, good linearity, good stability, fast response, simple manufacturing process, and low cost. It has potential application value.

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“…Fig. 2 shows that the coupling region of microfiber consists of strong coupling region and weak coupling region [26].…”

Section: Sensing Principlementioning

confidence: 99%

High-Sensitivity Loop-Fiber Temperature Sensor Based on Distilled Water Cladding

Fan

Wang

et al. 2019

IEEE Photonics J.

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“…En estas expresiones, puesto que el diámetro en la fibra decae a valores muy pequeños en el acoplador, típicamente menores a 20 µm, el revestimiento puede ser considerado como el núcleo de la guía de onda, y el aire como el revestimiento. Bajo esta consideración, la constante de acoplamiento puede aproximarse a la siguiente expresión [25]:…”

Section: Coeficiente De Acoplamiento Y Espaciamiento Entre Canalesunclassified

Estudio experimental de acopladores bicónicos de fibra óptica aplicados al desarrollo de multiplexores por división de longitud de onda

et al. 2018

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Se reporta un estudio experimental de la técnica de fabricación de acopladores bicónicos de fibraóptica y su aplicación al desarrollo de multiplexores por división de longitud de onda (WDM, wavelength division multiplexer). Los parámetros de fabricación requeridos para el WDM son obtenidos del análisis teórico de la respuesta espectral de un acoplador débilmente fusionado. Como caso particular, se reporta el desarrollo de un WDM 1550/1850 nm, el cual es un dispositivo fundamental en el desarrollo de láseres de fibraóptica dopada con Tulio. Las dimensiones finales del dispositivo son una longitud total de 36.3 mm, una cintura uniforme de 6.5 mm de largo con una sección transversal de 23 µm. El dispositivo exhibe bajas pérdidas por inserción de 0.17 dB, un espaciamiento entre canales de 303.52 nm y ancho de banda de ± 50 nm. Este trabajo establece una guía de fabricación para el desarrollo de acopladores y dispositivos WDM de fibraóptica. Descriptores: Acopladores bicónicos de fibra; multiplexación por división de longitud de onda; laser de fibra dopada de Tulio. An experimental study of the technique of fused biconical fiber couplers for the development of wavelength division multiplexers (WDM) is presented. The fabrication parameters required for the WDM are obtained from the theoretical analysis of the spectral response of a weakly fused coupler. As a particular case, the development of a 1550/1850 nm WDM is reported, which is a fundamental device in the implementation of Thulium-doped fiber lasers. The WDM has the total length of 36.3 mm, and a uniform tapered waist length of 6.5 mm with 23 µm of cross section. The device exhibits insertion losses of 0.17 dB, a channel spacing of 303.52 nm and a ± 50 nm bandwidth. This publication could be considered a guide for the development of fiber optic couplers and WDM devices.

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“…In the directional coupler with L c = 12 mm, this period decreases from 30 nm to 10 nm when wavelength increases from 1200 nm to 1600 nm. However, the modulation period may be as small as 0.5 nm required in the last generations of wavelength division multiplexing (WDM) systems [26] by properly decreasing the coupler length. Unavoidable increase of optical losses in this case has to be still low in the proposed device in view of its single-fiber construction.…”

Section: Spectral Filtration Of Broadband Light Inmentioning

confidence: 99%

All-Fiber Source of Broadband Light With Modulated Spectrum Based on Twin-Core Fiber

Erkin

Нематов

Tajibaev

2016

J. Lightwave Technol.

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We proposed and experimentally demonstrated an all-fiber source of broadband (visible or near infrared) light with modulated spectrum pumped by a picosecond Nd:YAG laser (1064 or 532 nm). Spatial separation of areas for light generation and spectral filtering in such a device consisting of a section of twin-core fiber and a directional coupler constructed at its exit end, as well as rigid control of coupling parameters by employing splicing/tapering technique, allowed us to develop the broadband source of ultrashort light pulses with a specific spectral form.

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Guidelines for design and fabrication of fused fiber coupler based wavelength division multiplexings

Cited by 16 publications

References 14 publications

High-Sensitivity Loop-Fiber Temperature Sensor Based on Distilled Water Cladding

High-Sensitivity Loop-Fiber Temperature Sensor Based on Distilled Water Cladding

Estudio experimental de acopladores bicónicos de fibra óptica aplicados al desarrollo de multiplexores por división de longitud de onda

All-Fiber Source of Broadband Light With Modulated Spectrum Based on Twin-Core Fiber

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