Programmable all-fiber structured waveshaper based on linearly chirped fiber Bragg grating and digital thermal controller

Zhang, Hailiang; Tang, Ming; Xie, Yiwei; Liao, Huiqi; Fu, Songnian; Shum, Ping; Liu, Deming

doi:10.1007/s00340-013-5600-5

Cited by 10 publications

(7 citation statements)

References 7 publications

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“…When temperature is changed, both the RI and dimension of the sensing fiber will be changed. Since the thermal-optic coefficient (8.6 × 10 −6 /°C) is much larger than the thermal expansion coefficient (5.5 × 10 −7 /°C) for silica 28 , the dimension change induced by temperature variation can be neglected. Therefore, the wavelength shifts of the three resonant dips due to the temperature variation Δ T can be described by the following formulas, respectively:…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive strain sensor based on helical structure combined with Mach-Zehnder interferometer in multicore fiber

Zhang

Shum

et al. 2017

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Optical fiber sensors for strain measurement have been playing important roles in structural health monitoring for buildings, tunnels, pipelines, aircrafts, and so on. A highly sensitive strain sensor based on helical structures (HSs) assisted Mach-Zehnder interference in an all-solid heterogeneous multicore fiber (MCF) is proposed and experimentally demonstrated. Due to the HSs, a maximum strain sensitivity as high as −61.8 pm/με was experimentally achieved. This is the highest sensitivity among interferometer-based strain sensors reported so far, to the best of our knowledge. Moreover, the proposed sensor has the ability to discriminate axial strain and temperature, and offers several advantages such as repeatability of fabrication, robust structure and compact size, which further benefits its practical sensing applications.

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Section: Resultsmentioning

confidence: 99%

Highly sensitive strain sensor based on helical structure combined with Mach-Zehnder interferometer in multicore fiber

Zhang

Shum

et al. 2017

Sci Rep

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“…Recently, we have demonstrated a novel programmable all-fiber structured waveshaper based on linearly chirped fiber Bragg grating and digital thermal controller [11]. The computer controlled TPH adhered with optical fiber is essential to provide digital manipulation.…”

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Programmable multi-wavelength filter with Mach–Zehnder interferometer embedded in ethanol filled photonic crystal fiber

et al. 2014

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We experimentally demonstrated a free spectrum range (FSR) tunable comb filter based on a programmable thermo-controlled Mach-Zehnder interferometer. The device is constructed by sandwiching a length of ethanol-filled photonic crystal fiber between single-mode fibers. A digital thermal printer head is used to facilitate the interference as well as to adjust the phase difference by selectively activating the independent heating elements, thus the FSR can be digitally tuned conveniently. The filter shows a feature of periodic equalized passbands with flat-top steep-edge as well as a high extinction ratio over a very wide range of wavelengths from 1.52 to 1.58 μm.

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“…Recently, we proposed and demonstrated an all-fiber structured bandwidth-tunable and wavelength-variable optical filter based on a linearly chirped fiber Bragg grating (LCFBG) and a thermal printhead (TPH) [11]. With its reconfigurable filtering performance, this allfiber waveshaper technology is ideal to perform temporal differentiation operation for incoming optical pulses with any given central wavelength.…”

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confidence: 99%

“…2 [11]. A notch filter having a transfer function of a second-order differentiator can be implemented with this method.…”

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Programmable wavelength-tunable second-order optical temporal differentiator based on a linearly chirped fiber Bragg grating and a digital thermal controller

et al. 2014

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We proposed and experimentally demonstrated an all-fiber structured wavelength-tunable second-order optical temporal differentiator based on a linearly chirped fiber Bragg grating and a digital-controlled thermal array. The central frequency of the differentiation can be reconfigured from 192.141 to 192.616 THz by a programmable circuit. In the experiment, a second-order differentiator with 3 dB bandwidth of 0.086 THz is achieved with a root mean square error of 4.89%.

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Programmable all-fiber structured waveshaper based on linearly chirped fiber Bragg grating and digital thermal controller

Cited by 10 publications

References 7 publications

Highly sensitive strain sensor based on helical structure combined with Mach-Zehnder interferometer in multicore fiber

Highly sensitive strain sensor based on helical structure combined with Mach-Zehnder interferometer in multicore fiber

Programmable multi-wavelength filter with Mach–Zehnder interferometer embedded in ethanol filled photonic crystal fiber

Programmable wavelength-tunable second-order optical temporal differentiator based on a linearly chirped fiber Bragg grating and a digital thermal controller

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