Compact high-power tunable three-level operation of double cladding Nd-doped fiber laser

Abstract

Abstract-We present a compact high-power continuous-wave tunable neodymium-doped double cladding fiber laser operating on three-level 4 F 3 2 -4 I 9 2 transition with a maximum output power up to 810 mW. At 926.7 nm, it has a maximum slope efficiency of 49.3% against absorbed 808-nm pump. By compressing the fiber Bragg grating, 15-nm tuning range is achieved.Index Terms-Double-cladding fiber laser, Nd fiber laser, threelevel transition, tunable laser.

Watt-level single-frequency tunable neodymium MOPA fiber laser operating at 915–937 nm

“…Recently, neodymium (Nd) doped fiber operating on the 4 F3/2-4 I9/2 transition have attracted high interest for the development of high-power lasers operating in the 900-940 nm spectral window. However, this type of lasers has only been demonstrated in longitudinal multimode operation, by using resonant cavity configurations combined with wavelength selection elements [7][8][9] or with photonic crystal fiber [10], in order to increase the gain at 910-940 nm and suppress the 1060 nm emission. In this Letter, we report for the first time to the best of our knowledge a Watt-level single-frequency all-fiber laser, tunable in the 915-937 nm window, with an output power in excess of 2 W from 921 to 933 nm.…”

Solving Rate Equations Including Background Losses Applicable to Threshold Pumped Fiber Lasers with Three-Energy-Level Dopants

“…No doubt, rare earth doped fiber lasers (RDFLs) have become an important light sources in many areas [1][2][3][4][5][6], and considerable efforts have been devoted to characterizing this type of lasers, leading to a rich variety of useful results. In theoretical studies, the rate equations (REs) are still the most widely used method in predicting the laser characteristics, and many attempts have been tried to extract analytical results from these nonlinear equations [7][8][9][10][11].…”

Analytical solutions to rate equations including losses describing threshold pumped fiber lasers

“…Rare earth doped fiber lasers (RDFLs) have attracted much attention recently because of the compactness, ruggedness, high beam quality and efficiency, and their potential applications to telecommunications, industry, etc., and a rich variety of useful results have been reported on this type lasers [1][2][3][4][5]. At present, the rate equations (REs) are still the most widely used and powerful tool to theoretically predict the laser characteristics [6][7][8][9].…”