Multiwavelength fiber sources based on double-pass superfluorescent fiber sources

Abstract

We demonstrate a new technique to generate a high-power multiwavelength fiber source (MWFS) by inserting cascaded long-period fiber gratings (LPFG's) in double-pass Er-doped fiber (EDF) superfluorescent fiber sources. 20 channels with extinction ratios larger than 10 dB can be obtained between 1525-1560 nm with appropriate EDF lengths. Though the total output power decreases due to the insertion of the cascaded LPFG's, the power in each channel for the proposed MWFS is larger than that obtained by using the spectrum slicing technique because of power redistribution. We also demonstrate that by using another LPFG in such a source to reduce the power variation among the desired channels. The wavelength stability of the source is shown to be determined by the cascaded LPFG's rather than by the EDF.

Band selective C− or C+L-band ASE source using the backward feedback technique

“…The use of the ASE source for EDFA characterization, optical sensing, and fiber optic gyroscope [2][3][4] has further emphasized its importance. In the past decades, various designs of ASE source based on EDF have been proposed and investigated with the aim to improve its performance parameters such as operating bandwidth, mean wavelength stability, power density and conversion efficiency to meet the application requirements [5][6][7][8][9].…”

High pumping-efficiency and wideband L-band erbium-doped fiber ASE source using two-stage double-pass backward pumping configuration

“…The erbium-doped fiber (EDF) based ASE sources have been applied in various areas such as a light source for fiber optic gyroscopes (FOGs), component testing sources and spectrum sliced dense wavelength-division-multiplexing (DWDM) systems [1][2][3] because they can simultaneously offer broad spectral linewidth, high output power and excellent mean wavelength stability to satisfy application requirements. In the past few years a lot of work have been done on conventional wavelength band (C-band) EDF ASE source and the double-pass backward(DPB) configuration has been proved to offer the highest output power, higher mean wavelength stability and broader linewidth for the C-band ASE sources [4].…”

Design and optimization of a high-power L-band ASE fiber source

“…Incoherent broadband optical source with low spectral ripples and high spectral intensity based on the amplified spontaneous emission (ASE) from an erbium-doped fiber (EDF) are desirable for various applications such as spectrum sliced sources for dense wavelength division multiplexing systems, optical components characterization testing, optical sensor systems, and fiber optic gyroscopes [1][2][3][4]. In the past decades, various designs of ASE source based on EDF have been proposed and investigated with the aim to improve its performance parameters such as operating bandwidth, mean-wavelength stability, power density and conversion efficiency.…”