A simple linear cavity dual-wavelength fiber laser using AWG as wavelength selective mechanism

Abstract

In this paper, a simple design of linear cavity dual-wavelength fiber laser (DWFL) is proposed. Operating in the C-band region stretching from 1538.3 nm to 1548.6 nm, an arrayed waveguide grating (AWG) is used to generate the dual-wavelengths output together with a broadband fiber Bragg grating as a back reflector and an optical circulator with a 10% output coupling ratio which acts as a front mirror. The measured average output power of the DWFL is about-5.66 dBm and with a side mode suppression ratio (SMSR) of 53.1 dB. The spacing

Multiple continuous-wave and pulsed modes of a figure-of-eight fibre laser

“…Fibre lasers are versatile low-cost sources that are attractive for a wide range of applications. In continuous-wave mode, tunable and multiwavelength laser sources are required for wavelength division multiplexing (WDM), fibre sensors and optical instrument calibration, for example [1][2][3][4][5][6][7]. On the other hand, self-pulsing, passively Q-switched [8,9] and mode-locked [10,11] fibre lasers, operating in pulsed mode, make it possible to reach values of peak power much higher than their continuous-wave counterparts, allowing the use of these sources for studying and exploiting nonlinear effects in fibres, a framework in which supercontinuum generation is now receiving particular attention.…”

Tunable single Stokes extraction from 20 GHz Brillouin fiber laser using ultranarrow bandwidth optical filter

“…Instead of generating the 10 GHz spacing Brillouin fiber laser that is normally observed, we demonstrate a double-spacing Brillouin Stokes since the extraction of the individual 10 GHz Stokes lines can be a challenging task [11], making the Brillouin fiber laser not attractive as a laser source. In this setup, the extraction of 20 GHz spacing lines is achievable and demonstrated in this section.…”

“…An arrayed waveguide grating (AWG) with 10 GHz spacing would be ideal for on-chip Stokes signal (de)multiplexing [10,11]. However, it requires a complex design, stringent fabrication requirements, and a large footprint to achieve the required narrow channel spacing [12].…”

Reconfiguration of the multiwavelength operation of optical fiber ring lasers by the modifiable intra-cavity induced losses of an in-fiber tip probe modal Michelson interferometer

“…To the best of our knowledge, this work is the first to present a very simple method for reshaping the output emission in fiber lasers and controling the number of emission lines that can be implemented in ring cavity fiber lasers. In addition, the laser ring cavity can be altered for adaptation to a particular situation or application, for example by using another active medium, or even altering the ring cavity using methods that have already been proposed, such as changing the polarization light state in the ring cavity [34] or cooling the fiber in liquid nitrogen [35] to increase the lasing peaks of the modulated output laser spectrum. Another way to improve this work is by using a mirror in the planar face end of the tip probe to decrease the cavity losses caused by the reflection ∼96% and hence increase the laser gain and efficiency.…”