Single-frequency MOPA Er/sup 3+/ DBR fiber laser for WDM digital telecommunication systems

Bonfrate, G.; Vaninetti, F.; Negrisolo, F.

doi:10.1109/68.701518

Cited by 35 publications

(13 citation statements)

References 8 publications

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“…6, the laser exhibits a resolution-limited spectral width of less than 3 kHz. Such narrow spectral widths, indicative of single longitudinal mode operation, are normally seen in these Er:fiber lasers [10][11][12]. The selection of a single longitudinal mode probably results from the formation of an intracavity refractive index grating due to spatial hole burning in the Er-doped fiber.…”

Section: Rf 100khzmentioning

confidence: 87%

Distributed fiber optic pressure/seismic sensor for low-cost monitoring of long perimeters

2003

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The use of an optical fiber as a distributed sensor for detecting, locating, and (with suitable signal processing) classifying intruders is proposed. Phase changes resulting from either the pressure of the intruder on the ground immediately above the buried fiber or from seismic disturbances in the vicinity are sensed by a phase-sensitive optical time-domain reflectometer (φ−OTDR). Light pulses from a cw laser with a narrow (kHz range) instantaneous linewidth and low (MHz/min range) frequency drift are injected into one end of the single mode fiber, and the backscattered light is monitored with a photodetector. Results of analyses and experimental studies to establish the feasibility of the concept are described. Simulations predict a range of 10 km with 35 m range resolution and 30 km with 90 m range resolution. Experiments indicate adequate (several π-rad) phase changes are produced by intruders on foot for burial depths in the 20 -40 cm range in sand and in clay soils. A phase perturbation in a fiber has been detected and located in a laboratory demonstration of the φ-OTDR using an Er:fiber laser as the light source. This technology could in a cost-effective manner provide enhanced perimeter security for nuclear power plants, electrical power distribution centers, storage facilities for fuel and volatile chemicals, communication hubs, airports, government offices, military bases, embassies, and national borders. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 05/14/2015 Terms of Use: http://spiedl.org/terms Proc. of SPIE Vol. 5090 135 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 05/14/2015 Terms of Use: http://spiedl.org/terms

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Section: Rf 100khzmentioning

confidence: 87%

Distributed fiber optic pressure/seismic sensor for low-cost monitoring of long perimeters

2003

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“…As shown inFigure 15, the laser exhibits a resolution-limited spectral width of ≤ 3 kHz. Such narrow spectral widths, indicative of single longitudinal mode operation, are frequently seen in these Er-fiber lasers[25][26][27].The selection of a single longitudinal mode probably results from the formation of an intracavity refractive index grating due to spatial hole burning in the Er-doped fiber.…”

mentioning

confidence: 87%

Distributed fiber optic intrusion sensor system for monitoring long perimeters

Juarez

Taylor

2005

SPIE Proceedings

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“…SLM-DFB laser is applicable in numerous fields, including-high precision optical measurement systems [1][2][3][4][5][6], high data rate optical coherent communications [7,8], laser radars [9], optical atomic clocks [10,11], ranging and remote sensing [12]. However, the performance parameters of sensitivity, precision, range, and noise of these systems depend on the span of the laser source linewidth employed [13,14]. In light of all these, the importance of SLM-DFB laser linewidth suppression is paramount.…”

Section: Introductionmentioning

confidence: 99%

1310 nm Narrow Linewidth Laser Assisted by the Feedback of Double-FBGs

et al. 2020

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Narrow linewidth lasers with kHz or Hz have attracted tremendous attention due to their versatile applications in optical fiber sensing and optical fiber communication fields. This is because the efficiency of these fields depends on the quality of the laser source employed. This paper proposes, simulates, and experimentally demonstrates a dual cavity fiber Bragg grating assisted feedback structure. Based on the Rayleigh backscattering mechanism, Vernier effect, and interference phenomenon, the 2 MHz linewidth of a 1310 nm distributed feedback laser was highly compressed to ~580 Hz with a side mode suppression ratio as high as 34 dB. The output power of our proposed laser was found to be stable at 2.0 mW. The outcome of this work presents an idea centered on laser linewidth compression that applies to DFB lasers operating at various wavelengths.

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Single-frequency MOPA Er/sup 3+/ DBR fiber laser for WDM digital telecommunication systems

Cited by 35 publications

References 8 publications

Distributed fiber optic pressure/seismic sensor for low-cost monitoring of long perimeters

Distributed fiber optic pressure/seismic sensor for low-cost monitoring of long perimeters

Distributed fiber optic intrusion sensor system for monitoring long perimeters

1310 nm Narrow Linewidth Laser Assisted by the Feedback of Double-FBGs

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