Low noise dual-wavelength erbium fiber laser in single-longitudinal-mode operation

2016

J. Lightwave Technol.

In this work, a new stable dual-wavelength erbium fiber ring laser for remote temperature measurements is proposed and experimentally demonstrated. The sensing element is composed of two fiber Bragg gratings and sensor interrogation is achieved with a dual-wavelength erbium fiber ring laser. This configuration is made by creating two symmetrical laser cavities with similar optical power. This topology allows the performance of two laser emission lines in single-longitudinal mode (SLM) and with a power instability lower than 0.23 dB, and an optical signal-to-noise ratio higher than 30 dB for all the emitted wavelengths. The application of this system for remote temperature measurements has been demonstrated even though the SLM regime cannot be maintained. Index Terms-Erbium-doped fiber (EDF), fiber Bragg grating (FBG), multi-wavelength lasing, single-longitudinal-mode (SLM).S. Diaz received the telecommunications engineering and Ph.D.

Section: A Experimental Ring Laser Setupmentioning

confidence: 93%

Stable Dual-Wavelength Erbium Fiber Ring Laser With Optical Feedback for Remote Sensing

2016

J. Lightwave Technol.

“…However, fiber ring lasers generate densely spaced longitudinal modes around the central lasing wavelength 6 , causing instability in the laser output, due to the multimode oscillation, mode competition and mode hopping of multiwavelength EDF lasers 3 . It's a key point the configuration of the ring laser to improve the behaviour of these lasers 7 . Single longitudinal-mode (SLM) fiber lasers do not suffer instabilities from mode competition or mode hopping.…”

Section: Introductionmentioning

confidence: 99%

Stable dual-wavelength erbium fiber laser for temperature measurements

Lopez-Amo

2015

SPIE Proceedings

In this work, a new stable dual-wavelength erbium fiber ring laser is proposed and experimentally demonstrated. This configuration is made by creating two symmetrical laser cavities with similar optical power. This topology allows the performance of two laser emission lines in single-longitudinal mode and with a power instability lower than 0.23 dB, and an optical signal-to-noise ratio higher than 40 dB for all the emitted wavelengths. The sensing capability of the FBGs enables this source to be also used as sensor-network multiplexing scheme. The system offers a better stability and higher optical signal to noise ratios than similar configurations.

“…An important feature of MEDRFLs is the optical signal-to-noise ratio (OSNR). In [18,19] a MEDFL with OSNRs as high as 65 dB and power instabilities around 1 dB was achieved using FBGs.…”

Section: Introduction Ulti-wavelength Fiber Lasers Have Attracted mentioning

confidence: 99%

Stable Multiwavelength Erbium Fiber Ring Laser With Optical Feedback for Remote Sensing

Leandro

Lopez-Amo

2015

J. Lightwave Technol.

In this work, we demonstrate a stable fiber sensing system for remote temperature measurements, where the sensing element is an array of four fiber Bragg gratings (FBGs) and sensor interrogation is achieved with a multi-wavelength erbium fiber ring laser. By introducing a feedback fiber loop in a fiber ring cavity, four laser emission lines were obtained simultaneously in single-longitudinal mode operation (SLM). The power instability obtained was lower than 0.5 dB with an optical signal-to-noise ratio (OSNR) higher than 50 dB for all the emitted wavelengths. The application of this system for remote temperature measurements has been demonstrated even though the SLM regime cannot be preserved.