Integrated Tm:fiber MOPA with polarized output and narrow linewidth with 100 W average power
Lawrence Shah,R. Andrew Sims,Pankaj Kadwani,Christina C. C. Willis,Joshua B. Bradford,Aaron J. Pung,Menelaos K. Poutous,Eric G. Johnson,Martin Richardson +8 more
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A Tm:fiber master oscillator power amplifier (MOPA) system producing 109 W CW output power, with >15 dB polarization extinction ratio, sub-nm spectral linewidth, and M2 <1.25, is reported on.Abstract:
We report on a Tm:fiber master oscillator power amplifier (MOPA) system producing 109 W CW output power, with >15 dB polarization extinction ratio, sub-nm spectral linewidth, and M2 <1.25. The system consists of polarization maintaining (PM) fiber and PM-fiber components including tapered fiber bundle pump combiners, a single-mode to large mode area mode field adapter, and a fiber-coupled isolator. The laser components ultimately determine the system architecture and the limits of laser performance, particularly considering the immature and rapidly developing state of fiber components in the 2 μm wavelength regime.read more
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High average power picosecond pulse and supercontinuum generation from a thulium-doped, all-fiber amplifier.
TL;DR: A high-power, picosecond, thulium-doped, all-fiber master oscillator power amplifier with average power of 120.4 W and the first demonstration of average power exceeding 100 W from an ultrashort pulse laser at 2 μm wavelength is demonstrated.
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High Average Power Thulium-Doped Silica Fiber Lasers: Review of Systems and Concepts
TL;DR: In this article, the spectroscopic properties of Tm3+ -doped silica are first detailed, revealing complex processes and large variations among published measurements, with outputs ranging from 1908 to 2130 nm.
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210 W single-frequency, single-polarization, thulium-doped all-fiber MOPA
TL;DR: To the best of the authors' knowledge, this is the first demonstration of average output power exceeding 200 W from a single-frequency, single-polarization, thulium-doped all-fiber laser at 2 µm wavelength region.
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102 W monolithic single frequency Tm-doped fiber MOPA
TL;DR: This is the first demonstration of average power exceeding 100 W from monolithic all-fiber laser near 2 μm wavelength, and the SBS threshold of the single frequency Tm-doped fiber amplifier is analyzed and estimated.
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Flat-top resonant reflectors with sharply delimited angular spectra: an application of the Rayleigh anomaly
TL;DR: The concept of Rayleigh reflectors where extremely sharp angular spectra with unity reflectance are obtained across considerable angular extents are introduced, which connects the fundamental concepts of GMR and the Rayleigh anomaly with interesting possible applications, including filters and couplers.
References
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Antiresonant reflecting optical waveguides in SiO2‐Si multilayer structures
TL;DR: In this article, a new type of optical waveguide utilizing an antiresonant reflector was described, which gave losses as low as 0.4 dB/cm for the TE mode.
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Cross relaxation and energy transfer upconversion processes relevant to the functioning of 2 μm Tm3+-doped silica fibre lasers
TL;DR: In this paper, the authors identify the cross relaxation (CR) and energy transfer upconversion (ETU) processes that are important to the operation of Tm 3+ -doped silica fiber lasers using the slope efficiency measured from a number of diode-pumped Tm3+-doped laser arrays.
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Low-phase-noise, single-frequency, single-mode 608 W thulium fiber amplifier
TL;DR: A chain of four Tm-doped fibers amplified a single-frequency, 2040 nm diode laser to 608 W with M(2)=1.05+/-0.03, to be known as the highest power obtained from any single- frequencies, single-mode fiber laser.
Journal ArticleDOI
High-energy 2μm Doppler lidar for wind measurements
Grady J. Koch,Jeffrey Y. Beyon,Bruce W. Barnes,Mulugeta Petros,Jirong Yu,Farzin Amzajerdian,Michael J. Kavaya,Upendra N. Singh +7 more
TL;DR: In this article, a coherent Doppler lidar at 2 m wavelength has been built with higher output energy 100 mJ than previously available, based on diode-pumped Ho:Tm:LuLiF, a recently developed laser material that allows more efficient energy extraction.
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Profiling atmospheric water vapor using a fiber laser lidar system
TL;DR: A compact, lightweight, and efficient fiber laser lidar system has been developed to measure water vapor profiles in the lower atmosphere of Earth or Mars and has made preliminary atmospheric measurements.