Effect of transverse distribution profile of thulium on the performance of thulium-doped fibre amplifiers

Emami, Siamak Dawazdah; Abdul-Rashid, H. A.; Ahmad, Harith; Ahmadi, A.; Harun, Sulaiman Wadi

doi:10.3116/16091833/13/2/74/2012

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…The light in the EDF is assumed to propagate as a number of optical beams of frequency bandwidth Δ . The wave propagation of signal , pump ± and noise power ± can be expressed as [10] 2 1 ( ) ( ) ( ) ( ),…”

Section: Mathematical Modelling Of Edfamentioning

confidence: 99%

Influence of fiber parameters to the erbium-doped fiber amplifier (EDFA) gain: A theoretical modeling

2017

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Abstract. This paper studies the theoretical analysis of erbium-doped fiber (EDF) amplification. The EDF amplification is investigated in order to understand its behavior and identify the relevant parameters that are used for formulating the amplification process related to spontaneous and stimulated emission. Results show that under certain condition, the selected fiber parameters such as fiber length, EDF pump power, signal power and pump direction would significantly contribute to the EDFA gain enhancement.

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Section: Mathematical Modelling Of Edfamentioning

confidence: 99%

Influence of fiber parameters to the erbium-doped fiber amplifier (EDFA) gain: A theoretical modeling

2017

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“…n T (r) and n T are transverse distribution profile (TDP) of doped fiber amplifier (DFA) and total dopant concentration per unit per length defined by [12], [14]:…”

Section: Principle Of Macro-bend Pdcf Sensormentioning

confidence: 99%

“…It is found that in PDCF higher overlapping parameter turns out gain enhancement in active fiber [12]- [14]. The mode field distribution for PDCF in comparison with normal doped fiber falls outside the doping area at the bending situation and suffers more due to active bending loss [15].…”

Section: Introductionmentioning

confidence: 99%

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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“…In this equation, E ðr ; '; !Þ refers to the guided mode's electric field, while N T is the total doping concentration of thulium ions per unit length, and n T ðr Þ represents the transverse distribution profile (TDP) of the TD-PCFA [21], [22]. The FV-FEM technique is utilized in order to calculate the electric field in the PCF fiber.…”

Section: Modeling Td-pcfamentioning

confidence: 99%

S-Band Gain Improvement Using a Thulium–Aluminum Co-Doped Photonic Crystal Fiber Amplifier

et al. 2014

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An extended method for gain and noise figure enhancement in the S-band using a thulium-doped photonic crystal fiber amplifier (TD-PCFA) is proposed and shown by numerical simulation. The principle behind the enhancement is the suppression of unwanted amplified spontaneous emission (ASE) using the PCF structure. This proposed PCF achieves the intended band-pass by doping the cladding with high index material and realizes appropriate short and long cut-off wavelengths by enlarging the air-holes surrounding the doped core region. The PCF geometrical structure is optimized so that high losses occur below the short cut-off wavelength (800 nm) and beyond the long cutoff wavelength (1750 nm). Furthermore, the PCF geometrical structure design allows for high ASE suppression at 800-and 1800-nm band, thus increasing the population inversion needed for amplification in S-band region as the 1050-nm pump propagates light in the band-pass. The proposed TD-PCFA demonstrates gain enhancements of 3-6 dB between 1420 and 1470 nm.

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Effect of transverse distribution profile of thulium on the performance of thulium-doped fibre amplifiers

Cited by 11 publications

References 15 publications

Influence of fiber parameters to the erbium-doped fiber amplifier (EDFA) gain: A theoretical modeling

Influence of fiber parameters to the erbium-doped fiber amplifier (EDFA) gain: A theoretical modeling

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

S-Band Gain Improvement Using a Thulium–Aluminum Co-Doped Photonic Crystal Fiber Amplifier

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