Narrow line width semiconductor optical amplifier based random laser

Shawki, Heba A.; Kotb, Hussein E.; Khalil, Diaa

doi:10.1117/12.2251786

Cited by 4 publications

(5 citation statements)

References 10 publications

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“…These lasers, developed from wide-band gain sources and Rayleigh backscattering [26] lead to narrow linewidth light sources. Sharp laser lines have often been considered in the literature as narrow longitudinal modes or single modes essentially because of the narrow spectral width [27][28][29]. Understanding the generation of narrow laser lines from an essentially flat gain spectrum still remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

On the Wavelength-Selective Nature of Rayleigh Backscattering in Single-Mode Fibers

Von Der Weid,

Tovar,

Margulis

2024

Preprint

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Spectral measurements of the Rayleigh backscattered light in a single-mode fiber are performed for a white input source with coherence length 100 times shorter than the fiber length. The experimentally measured spectrum of the backscattered light from a 45 cm-long fiber exhibits a jagged intensity profile that is highly wavelength-dependent. Measurement data were compared with model predictions based on small fluctuations of the fiber refractive index on a centimeter scale, generating interference fluctuations on the spectrum of the backscattered light. The agreement between measured data and model simulations supports that optical interference is behind the wavelength-selective nature of Rayleigh backscattering in single mode fibers and that white light becomes colored when backscattered in a single mode fiber.

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Section: Introductionmentioning

confidence: 99%

On the Wavelength-Selective Nature of Rayleigh Backscattering in Single-Mode Fibers

Von Der Weid,

Tovar,

Margulis

2024

Preprint

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“…In agreement with the behavior pictured in Figures 5.6(a) and 5.7, we see that the initial increase in the average power is due to the increase in the frequency of laser pulses, which maintain their peak power relatively constant. The increase in the floor power, also observed in [97,98], is due to the increase in the multimode population in the laser output. As demonstrated in Figure 5.9, the floor level extends to the FBG bandwidth, but the measurements of Figure 5.10 were limited by the 125 MHz-bandwidth detector used in this high resolution measurement.…”

Section: Spectral Analysismentioning

confidence: 79%

“…After the first random DFB fiber laser was proposed with distributed Raman gain, different gain mechanisms were employed to verify random laser action. Indeed, multiple works report the generation of random lasers with different gain mechanisms [12,13,18,22,[87][88][89][90][91][92][93][94][95][96][97][98][99]. SBS is one of the alternatives to provide gain for random laser action.…”

Section: Other Gain Mechanismsmentioning

confidence: 99%

Section: Other Gain Mechanismsmentioning

confidence: 99%

“…Several works reported on the usage of SOA-based random DFB fiber lasers [12,13,[96][97][98][99]. Although the mode structure was not discussed in detail, single longitudinal mode (SLM) operation with narrow linewidth has been claimed [97][98][99]. Linewidth measurements might indeed suggest that SOAbased random lasers operate in single mode, with FWHM of the order of a few kHz.…”

Section: Other Gain Mechanismsmentioning

confidence: 99%

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The Role of Rayleigh Backscattering of Coherent Light in the Mode Dynamics of Random DFB Fiber Lasers

BRAGA¹

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I would like to thank my advisor Jean Pierre von der Weid, whose teaching capabilities go far beyond optics and photonics. I learned to be curious about every tiny detail, which not often, but occasionally, hides incredible answers, revealed only to those who persist in being curious.To all my colleagues and friends from the photonics laboratory at PUC-Rio, who were always there to help and happy to discuss about all the interesting phenomena we witnessed over the years.To my wife, who enlightens my days with joy and love, being the best life-partner any man could ask for.To my mother, for her unlimited love and support, and for encouraging me along each and every step of the way.To my brother. My uttermost example of integrity, who has always chosen the path made of principles, that leads to character.Without them, this work would not have been possible. To all my family and friends, who directly or indirectly contributed to this work.This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CAPES) -Finance Code 001. And I would also like to thank the Brazilian agency CNPq for the financial support.

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Low-noise Brillouin random fiber laser with Auto-tracking dynamic fiber grating based on a saturable absorption ring

Pang

Zhao

et al. 2022

Infrared Physics & Technology

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Narrow line width semiconductor optical amplifier based random laser

Cited by 4 publications

References 10 publications

On the Wavelength-Selective Nature of Rayleigh Backscattering in Single-Mode Fibers

On the Wavelength-Selective Nature of Rayleigh Backscattering in Single-Mode Fibers

The Role of Rayleigh Backscattering of Coherent Light in the Mode Dynamics of Random DFB Fiber Lasers

Low-noise Brillouin random fiber laser with Auto-tracking dynamic fiber grating based on a saturable absorption ring

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