Widely tunable and switchable multiwavelength erbium-doped fiber laser based on a single ring cavity

Abstract

In this paper, we propose and demonstrate through numerical simulations a novel, to the best of our knowledge, widely tunable and switchable multiwavelength erbium-doped fiber laser (EDFL) operating in the 1524–1650 nm wavelength range covering the C-, L-, and U-bands. The EDFL is based on a single ring cavity and a single forward pump source operating at 980 nm wavelength. The length of the erbium-doped fiber and pumping configuration is optimized, enabling a wide tuning of 126 nm with an average lasing power of 15 dBm. Switchable multiple wavelengths are generated from the EDFL through an intracavity tunable optical filter (TOF) and a specially designed out-of-cavity comb filter (CF). Forty-nine wavelengths having average optical power and linewidth of around −10 dBm and 0.01 nm, respectively, are obtained at the output of the CF. Moreover, the free spectral range among the multiple wavelengths is adjusted easily by simply varying the frequency of sinusoidal radio frequency signal used to modulate the lasing signal obtained by tuning the intracavity TOF at a particular wavelength with the help of a dual-drive Mach–Zehnder modulator. The proposed EDFL is low cost, efficient, and highly stable with an average output power of around 15 dBm for 10% output coupling ratio over a 126 nm wide tuning range covering C-, L- and U-bands.

Online Testing Method for the Fine Spectral Characteristics of Narrow-Band Interference Filters Based on a Narrow-Linewidth Tunable Laser

“…For instance, in references [ 20 , 21 ], laser spectroscopy techniques were applied to atomic spectroscopy measurements, achieving hyperfine atomic spectra with resolutions reaching the MHz level. With the development of tunable laser technology, infrared wavelength lasers with a wide tuning range (in the order of nanometers) have become readily available [ 22 , 23 , 24 ]. The application of tunable infrared lasers in dense wavelength division multiplexing (DWDM) systems has greatly increased the number of communication channels [ 25 ], and the minimum wavelength spacing between two bands is as small as 0.2 nm.…”

A kind of multiwavelength erbium-doped fiber laser based on Lyot filter

“…In recent years, erbium-doped fiber lasers (EDFLs) have attracted significant attention in the field of optical fiber lasers [1] and have been widely used in infrared detection, optical radar, and dense wavelength division multiplexer (DWDM). [2,3] In the EDFL research field, mode-lock lasers, [4] tunable wavelength lasers, [5] Raman lasers, [6] and singlefrequency [7] lasers are important research interests owing to their different applications.…”

Multi-Physics and Multi-Objective Optimization for Fixing Cubic Fabry–Pérot Cavities Based on Data Learning

“…There have been numerous studies conducted on laser systems, including nonlinear optical materials [19,20] and the design of optical cavities with different shapes [21][22][23][24]. A cubic FP cavity has the advantage of being force-insensitive, making it appropriate for space missions [25].…”