Bending Sensor Based on $S$-Band Depressed Cladding Erbium-Doped Fiber

Rosolem, J.B.; Elias, Mauro Bíscaro; Bezerra, E. W.; Suzuki, Carlos K.

doi:10.1109/lpt.2010.2049097

Cited by 6 publications

(6 citation statements)

References 6 publications

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“…The loss variation of 30 dB for 8 m PCFA length obtained for 1540 nm signal in the range from 4 to 20 cm bending radius is better when compared with the best bending sensor introduced so far. For example in [10] and [11], Rosolem et. al., showed the fiber loss variation of 43 dB for the bending radius range from 1.8 to 3.8 cm bending radius using depressed cladding erbium doped fiber amplifier.…”

Section: Resultsmentioning

confidence: 99%

“…8(a) and (b), namely an amplifier and fiber laser respectively. The experimental setup was done based on [10], [11]. In Fig.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, Depressed Cladding Erbium Doped Fiber (DC-EDF) is a special fiber that uses the bending mechanism to obtain optical amplification in S-Band. The application of this fiber as new types of optical sensing systems has been presented by considering the DC-EDF amplification and lasing bend dependence characteristics [10]. For the case of DC-EDF, the peak wavelength of the amplified spontaneous emission (ASE) spectrum shifts as the bending radius decreases [11].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Bending Sensitivity in Partially Doped Core Fiber for Sensing Applications

et al. 2014

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A fiber based high sensitive bend sensor is proposed and demonstrated using a uniquely designed partially doped core fiber (PDCF). The fabrication method of PDCF with two core regions, namely an undoped outer region with a diameter of ∼9.5 µm encompassing a doped, inner core region with a diameter of 4.00 µm is explained. The mechanism of bending effect in proposed PDCF and the experimental setup for amplified spontaneous emission (ASE) based sensor and fiber laser based sensor is illustrated. For ASE sensor, the higher ASE power level loss as the spooling radius is reduced from 20 to 3 cm is measured. The gain peak shift to shorter wavelength with respect to the decrease of the spooling radius from 20 to 3 cm due to higher bending loss at smaller bending radius is observed. The results are in agreement with overlap factor variation of PDCF. As expected from ASE peaks variation, the fiber laser sensor spectral operation is changed from 1539 to 1530 nm range. This phenomenon is due to higher mode field diameter of longer wavelength and result of optical filtering at longer wavelengths. The experimental results showed the output of the ASE is also highly stable, with no observable variation in the power output over a measurement period of 1 h. The PDCF is also temperature insensitive.Index Terms-Optical sensors, partially doped core fiber, fiber laser sensor. 1530-437X

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Section: Resultsmentioning

confidence: 99%

“…8(a) and (b), namely an amplifier and fiber laser respectively. The experimental setup was done based on [10], [11]. In Fig.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Bending Sensitivity in Partially Doped Core Fiber for Sensing Applications

et al. 2014

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“…The reflective fiber optical sensor with modulated intensity was a typical fiber optical displacement sensor. [36][37][38][39][40][41][42][43][44][45][46][47][48] The transmitting fiber, which is usually called the input fiber, was the fiber that only transmitted the light from the optical source. Any change in the distance d between the fiber optical head and the reflector substrate surface modulated the intensity of the light that was detected by the receiving fiber, which is often called the output fiber.…”

Section: Experimental Methods and Fabricationmentioning

confidence: 99%

Characteristics and Applications of Tapered Fiber Optical Sensors for 1310 nm Wavelength

Hwang¹,

Cheng²,

Su³

2013

Jpn. J. Appl. Phys.

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Optical sensors for displacement measurement and fluorescence probes were designed and experimentally studied. This is the first time we used photonic sensors for displacement measurement and fluorescence probes at the same time using a long-wavelength (1310 nm) photon beam in the reflective mode. A tapered fiber sensor was chosen to increase the dynamic range for fluorescence probes. The results showed that the tapered fiber sensor exhibited a high resolution of 12 nm and a better dynamic range of 2 mm in our system. The relationship between resolution and dynamic range was experimentally found to vary with tapered fiber tilt angle. The precise diameter of the fiber microlens was measured. These were the characteristics considered in the manufacturing of our chosen device. Moreover, these novel 1310-nm-wavelength tapered fiber sensors with high resolution, good dynamic range, better reliability, and low cost may provide multipurpose applications, such as those in telecommunication systems, commercial measurements, and military inspection.

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“…Of late, there has been work done on the use of depressed-cladding erbium doped fibers (DC-EDF) [15,16] as a bend sensor. However, the drawback of this approach is that the peak wavelength of the amplified spontaneous emission (ASE) spectrum shifts as the bending radius decreases.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Insensitive Bend Sensor Using Entirely Centered Erbium Doping in the Fiber Core

Ahmad

Zulkifli

Muhammad

et al. 2013

Sensors

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A fiber based bend sensor using a uniquely designed Bend-Sensitive Erbium Doped Fiber (BSEDF) is proposed and demonstrated. The BSEDF has two core regions, namely an undoped outer region with a diameter of about 9.38 μm encompassing a doped, inner core region with a diameter of 4.00 μm. The doped core region has about 400 ppm of an Er2O3 dopant. Pumping the BSEDF with a conventional 980 nm laser diode gives an Amplified Spontaneous Emission (ASE) spectrum spanning from 1,510 nm to over 1,560 nm at the output power level of about −58 dBm. The ASE spectrum has a peak power of −52 dBm at a central wavelength of 1,533 nm when not spooled. Spooling the BSEDF with diameters of 10 cm to 2 cm yields decreasing peak powers from −57.0 dBm to −61.8 dBm, while the central wavelength remains unchanged. The output is highly stable over time, with a low temperature sensitivity of around ∼0.005 dBm/°C, thus allowing for the development of a highly stable sensor system based in the change of the peak power alone.

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Bending Sensor Based on $S$-Band Depressed Cladding Erbium-Doped Fiber

Cited by 6 publications

References 6 publications

Investigation of Bending Sensitivity in Partially Doped Core Fiber for Sensing Applications

Investigation of Bending Sensitivity in Partially Doped Core Fiber for Sensing Applications

Characteristics and Applications of Tapered Fiber Optical Sensors for 1310 nm Wavelength

Temperature-Insensitive Bend Sensor Using Entirely Centered Erbium Doping in the Fiber Core

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