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

Abstract

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.

Temperature Sensor Using a Multiwavelength Erbium-Doped Fiber Ring Laser

“…The system's sensitivity is about 8 pm/ ∘ C. Thus, this analysis is in good accordance with previous works [8][9][10].…”

Engineering of multiple bound states in the continuum by latent representation of freeform structures

“…Merging of multiple BIC points can be used to achieve robust ultra-high Q factor modes immune to out-of-plane scattering losses [11]. Moreover, being able to manipulate multiple BICs might further benefit areas where high Q factors are desirable at multiple frequencies such as nonlinear optics [12], and multi-wavelength sensing [13][14][15].…”

Switchable single- and dual-wavelength thulium/holmium co-doped fiber laser with single-longitudinal mode output

“…In addition, a simple dual-wavelength single longitudinal mode fiber laser utilizing birefringent fiber laser filter and saturable absorber is proposed and demonstrated for photonic generation of microwave signal. Not only for this purpose, the dual wavelength laser can also be widely utilized as sensing, such as a remote temperature measurement [22,23].…”