High-stability, linearly polarized mode-locking generation from a polarization-maintaining fiber oscillator around 2.8 µm.
Opt Lett
; 46(18): 4550-4553, 2021 Sep 15.
Article
em En
| MEDLINE
| ID: mdl-34525042
ABSTRACT
In this Letter, a high-stability, linearly polarized mode-locked polarization-maintaining (PM) Er3+-doped fluoride fiber oscillator at â¼2.8µm is presented for the first time, to the best of our knowledge, where an InAs-based semiconductor saturable absorber mirror is used as the mode locker, and a film polarizer is employed for maintaining the linearly polarized oscillation. In the free-running state, stable linearly polarized mode-locked pulses (τ=44ps and P=446mW) at 2.795 µm, with a high polarization extinction ratio of >23dB and a low integrated relative intensity noise of 0.087% [1 Hz-10 MHz], have been achieved, which can be strongly immune to external mechanical perturbations. By introducing a ruled reflective diffraction grating into the cavity in a Littman configuration, the continuous wavelength tuning of the linearly polarized mode-locked pulses in the range of 2717-2827 nm is obtained as well. To the best of our knowledge, this marks the first demonstration of a linearly polarized PM fiber oscillator in the >2.5µm mid-infrared region.
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MEDLINE
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En
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Opt Lett
Ano de publicação:
2021
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Article