All-fiber polarization interference filter based uniform multiwavelength erbium-doped fiber laser

Abstract

We demonstrate a compact and stable room-temperature multiwavelength erbium doped fiber laser by employing 45° tilted fiber gratings based on an all-fiber polarization interference filter. Benefiting from the filter, the channel number, linewidth, uniformity and stabilization of the multiwavelength laser are greatly improved. The filter also works as a functional polarizing device in a nonlinear polarization rotation, leading to the multiwavelength operation. Instead of a highly nonlinear fiber, the single mode fiber is used to provide enough linearity and to reduce the splice loss. More than 80 wavelengths (within a 3 dB bandwidth), lasing with a linewidth of 0.03 nm and a signal-to-noise ratio of 33 dB, are obtained. The wavelength spacing of 0.164 nm agrees with the channel spacing of the filter, and can be flexibly controlled by adjusting the length of the filter.

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. Multiwavelength tunable EDFLs have many advantages such as a large laser number, narrow linewidth, high stability, wide tunable laser wavelength, and high optical signal-to-noise ratio (SNR), [8,9] thus, they have been studied by many scientific research institutions.…”

“…[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. Multiwavelength tunable EDFLs have many advantages such as a large laser number, narrow linewidth, high stability, wide tunable laser wavelength, and high optical signal-to-noise ratio (SNR), [8,9] thus, they have been studied by many scientific research institutions.…”

Terahertz polarization reflective devices based on one-dimensional grating structure

“…Polarization is one of the basic characteristics of micro-nano optics [1][2][3]. Different polarization beam splitting devices can be designed according to functions [4][5][6][7].…”