A Microwave Signal Generation Technique Based on Brillouin-Erbium Fiber Laser

Abstract

An all-optical microwave signal generator based on multiwavelength Brillouin-Erbium fiber laser (MBEFL) is proposed. The MBEFL unit is designed at fixed wavelength spacing of 0.084 nm, which corresponds to ~10 GHz carrier signal. The underlying mechanism MBEFL unit is by recycling the backscattered Stokes waves into the cavity to generate higher-order Stokes waves. Heterodyning process is then applied to the Brillouin pump (BP) consisted of first-order Brillouin Stokes (BS1) (0.084 nm spacing) and second-order Brillouin Stokes (BS2) (0.168 nm spacing) signals by using a photodetector (PD). The heterodyned outputs are microwave signals at the frequencies of 10.56 GHz and 21.2 GHz, relative to first order and second order Stokes waves, respectively. These microwave signals are experimentally achieved by controlling the EDF pump power where the EDF pump power can be as low as 20 mW.

Switchable emissions of an Erbium-doped fiber laser using cascaded MZIs based on CHCF

“…Multiwavelength erbium-doped fiber lasers (EDFLs) are used for different applications like wavelength division multiplexing [1], [2], optical fiber sensing [3], [4], and microwave photonics [5], [6]. In this kind of lasers, unstable emissions is commonly appreciated [7][8][9].…”

Highly Stable Switchable Emissions of an Erbium-Doped Fiber Ring Laser Using Cascaded MZIs Based on CHCF

“…In the last two decades, multiwavelength erbium-doped fiber lasers (EDFLs) have become reliable light sources for different applications such as wavelength division multiplexing [1,2], optical fiber sensing [3,4], and microwave photonics [5,6], to mention but a few. As is well known, homogeneous line broadening produces high mode competition, thus causing the generation of unstable emissions in multiwavelength EDFLs [7][8][9].…”