Optical Sensing Systems Based on Depressed Cladding Erbium Doped Fiber

Rosolem, J.B.; Elias, Mauro Bíscaro; Ribeiro, Luiz A. de S.; Suzuki, Carlos K.

doi:10.1109/jlt.2011.2174139

Cited by 3 publications

(6 citation statements)

References 17 publications

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“…This is shown in Figure 4, which shows a nearly linear slope. For the case of Depressed-Cladding Erbium Doped Fibers (DC-EDF), the peak wavelength of the ASE spectrum shifts as the bending radius decreases, as demonstrated by Rosolem et al [16]. This will allow a simple detection system to be built, where a filter can be inserted to coincide the peak wavelength, which then allows for the measurement of the output power against the bending radius.…”

Section: Resultsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

“…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

View full text Add to dashboard Cite

show abstract

“…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%

“…Doped fiber macro bend sensors are relatively few and used to measure parameters such as temperature, deformation, and pressure [6]- [11]. A fiber laser pressure sensor utilizing erbium doped fiber as the amplification medium in a linear cavity resonator was reported earlier in [8].…”

Section: Introductionmentioning

confidence: 99%

“…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]. This will allow a simple detection system to be built, where a filter can be inserted to coincide the peak wavelength, which then allows for the measurement of the output power against the bending radius.…”

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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Performance improvements in fiber-bending pressure sensors by using depressed cladding erbium doped fiber

2014

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Optical Sensing Systems Based on Depressed Cladding Erbium Doped Fiber

Cited by 3 publications

References 17 publications

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

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

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

Performance improvements in fiber-bending pressure sensors by using depressed cladding erbium doped fiber

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