Abstract
We demonstrate generation of sub-100 fs pulses at 1.5 µm in a mode-locked erbium-doped fiber laser using a 45°-tilted fiber grating element. The laser features a genuine all-fiber configuration. Based on the unique polarization properties of the 45°-tilted fiber grating, we managed to produce sub-100 fs laser pulses through proper dispersion management. To the best of our knowledge, this is the shortest pulse generated from mode-locked lasers with fiber gratings. The output pulse has an average power of 8 mW, with a repetition rate of 47.8 MHz and pulse energy of 1.68 nJ. The performance of laser also matches well the theoretical simulations.
Highlights
Ultra-short pulse fiber lasers play an important role in the modern research and industrial applications ranging from telecom and metrology to biological/chemical applications and machining
45°-tilted fiber grating (45TFG) is a promising type of in-fiber polarizer based on the pileof-plate principle which taps out the s-light and propagates the p-light
We reported the shortest pulse duration generation using a 45TFG for nonlinear polarization rotation (NPR) mode-locked erbium-doped fiber laser with sub100 fs pulse duration, which operates in a dissipative stretch-pulse regime [30,31,32] according to our simulations
Summary
Ultra-short pulse fiber lasers play an important role in the modern research and industrial applications ranging from telecom and metrology to biological/chemical applications and machining. The shortest pulse generated through CNT is 74 fs [16]; SESAM can produce as short as 102 fs [17], and graphene is able to achieve a mode locked erbium fiber laser with 174 fs output duration [18]. 45°-tilted fiber grating (45TFG) is a promising type of in-fiber polarizer based on the pileof-plate principle which taps out the s-light and propagates the p-light Such device benefits from the all-fiber structure and low insertion loss [20,21]. We reported the shortest pulse duration generation using a 45TFG for NPR mode-locked erbium-doped fiber laser with sub100 fs pulse duration, which operates in a dissipative stretch-pulse regime [30,31,32] according to our simulations
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