Hybrid nanocomposite film provides FWM and Fabry Perot Filter: Towards multi-wavelength fiber laser generation in 1 µm region

Fiber laser with dual-channel and a selectable comb filter based on Vernier effect of parallel-connected two Mach–Zehnder interferometers

“…In multi-wavelength laser sources, one of the focuses is on the wavelength-selective comb filter to select the required wavelength component or avoid interference between wavelength components 5 , 6 . In recent years, owing to their many benefits, including their high efficiency, robustness, low cost, high signal-to-noise ratio, and compact structure, the generation of dual-wavelength or multi-wavelength fiber lasers have been extensively investigated 7 , 8 . They have a wide range of application prospects in various fields including wavelength-division multiplexed communication, laser comb generation, and optical fiber sensing 9 …”

“…5,6 In recent years, owing to their many benefits, including their high efficiency, robustness, low cost, high signal-to-noise ratio, and compact structure, the generation of dual-wavelength or multi-wavelength fiber lasers have been extensively investigated. 7,8 They have a wide range of application prospects in various fields including wavelength-division multiplexed communication, laser comb generation, and optical fiber sensing. [9][10][11] Incorporation typically of a comb filter into a fiber laser cavity produces multiple seed signals which are necessary for the realization of a multi-wavelength fiber laser.…”

In Situ Synthesis of Gold Nanoparticles in Layer-by-Layer Polymeric Coatings for the Fabrication of Optical Fiber Sensors

“…One interesting application of certain polymeric composites is that they can be used as a synthesis medium, enabling the In Situ Synthesis (ISS) of nanoparticles within the polymeric matrix using thermal treatments [20] or chemical reduction methods [21]. Compared to other techniques for the nanoparticle fabrication in optical coatings that may require special conditions or complicated equipment [22][23][24], the ISS technique is a wet-chemical synthesis route, capable of loading the nanoparticles gradually into previously existing optical coatings, under room conditions, while allowing for the continuous monitoring of optical responses by sensors. It is a simple and promising technique for nanoparticle synthesis and a good post-fabrication method to modify the optical properties of sensitive coatings.…”