High Power Diode-Seeded Fiber Amplifiers at 2 μm—From Architectures to Applications

Heidt, Alexander M.; Li, Zhihong; Richardson, David J.

doi:10.1109/jstqe.2014.2312933

Cited by 45 publications

(17 citation statements)

References 85 publications

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“…Fortunately, the Thulium (Tm 3+ ) doped fiber amplifier (TDFA) offers a route to significantly enhanced amplification bandwidths around 2µm. The remarkably broad emission spectrum of the 3 F4 -3 H6 transition in Tm-doped silica covers about 30 THz (~1700 to ~2100 nm [10]) and was shown to give about 22 THz (1830-2050 nm) amplification bandwidth in a single device [11]- [12], more than two times that of the Erbium doped fiber amplifier (EDFA) of similar configuration/complexity. Through more complex TDFA designs amplification has been demonstrated over the full 30 THz bandwidth, with further extension still possible.…”

Section: Introductionmentioning

confidence: 99%

High-Capacity Directly Modulated Optical Transmitter for 2-μm Spectral Region

Liu

Chen

et al. 2015

J. Lightwave Technol.

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Abstract-The 2-µm wave band is emerging as a potential new window for optical telecommunications with several distinct advantages over the traditional 1.55µm region. First of all, the Hollow-Core Photonic Band Gap Fiber (HC-PBGF) is an emerging transmission fiber candidate with ultra-low nonlinearity and lowest latency (0.3% slower than light propagating in vacuum) that has its minimum loss within the 2-µm wavelength band. Secondly, the Thulium-doped fiber amplifier that operates in this spectral region provides significantly more bandwidth than the Erbium-doped fiber amplifier. In this paper we demonstrate a single-channel 2-µm transmitter capable of delivering >52 Gbit/s data signals, which is twice the capacity previously-demonstrated. To achieve this we employ discrete multi-tone (DMT) modulation via direct current modulation of a Fabry-Perot semiconductor laser. The 4.4-GHz modulation bandwidth of the laser is enhanced by optical injection locking, providing up to 11 GHz modulation bandwidth. Transmission over 500-m and 3.8-km samples of HC-PBGF is demonstrated.

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Section: Introductionmentioning

confidence: 99%

High-Capacity Directly Modulated Optical Transmitter for 2-μm Spectral Region

Liu

Chen

et al. 2015

J. Lightwave Technol.

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“…A second 1565-nm core-pumped Tm-doped fiber amplifier, compromised of in-house fabricated single-mode Tm-doped fiber and Er/Yb co-doped fiber laser, increased the signal power to 48 mW. The detailed design consideration of the Tm-doped fiber amplifier system can be found in our previous work [14]. A grating-based filter, comprising a pair of circulators and two fiber Bragg gratings (FBGs), was used after the second amplifier to remove further ASE and narrow the bandwidth of the signal spectrum, which was broadened due to the nonlinear effects of self-phase modulation (SPM) and modulation instability (MI).…”

Section: Introductionmentioning

confidence: 99%

Highly efficient frequency doubling and quadrupling of a short-pulsed thulium fiber laser

Liang

et al. 2018

Appl. Phys. B

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We report the second harmonic generation and fourth harmonic generation of the output from a short-pulsed (~ 80 ps) thulium-doped fiber laser, generating 976 and 488 nm wavelengths with high efficiency. With a narrow-linewidth (0.5 nm) pump at a power of 3.2 W, a second harmonic power of 2.4 W was generated at 976 nm with a conversion efficiency reaching 75%. For FHG, 690 mW of power at 488 nm was obtained from frequency doubling of 976 nm with a conversion efficiency of 30%.

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“…In order to realize an optical communications system, high quality optical amplifiers are indispensable. Thulium-doped fiber amplifiers (TDFAs) have recently been shown to provide high gain, low noise amplification at wavelengths spanning the wavelength range 1660 -2050 nm [12][13][14][15]. Operating a TDFA at wavelengths >2050 nm is however difficult due to the decreasing emission cross-section of thulium [16].…”

Section: Introductionmentioning

confidence: 99%

High gain holmium-doped fibre amplifiers

Simakov¹,

Li²,

Jung³

et al. 2016

Opt. Express

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Abstract:We investigate the operation of holmium-doped fibre amplifiers (HDFAs) in the 2.1 µm spectral region. For the first time we demonstrate a diode-pumped HDFA. This amplifier provides a peak gain of 25 dB at 2040 nm with a 15 dB gain window spanning the wavelength range 2030 -2100 nm with an external noise figure (NF) of 4-6 dB. We also compare the operation of HDFAs when pumped at 1950 nm and 2008 nm. The 1950 nm pumped HDFA provides 41 dB peak gain at 2060 nm with 15 dB of gain spanning the wavelength range 2050 -2120 nm and an external NF of 7-10 dB. By pumping at the longer wavelength of 2008 nm the gain bandwidth of the amplifier is shifted to longer wavelengths and using this architecture a HDFA was demonstrated with a peak gain of 39 dB at 2090 nm and 15 dB of gain spanning the wavelength range 2050 -2150 nm. The external NF over this wavelength range was 8-14 dB. nm gain extension towards 1.7 μm for diode-pumped silica-based thulium-doped fiber 2016 Optical Society of America

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High Power Diode-Seeded Fiber Amplifiers at 2 μm—From Architectures to Applications

Cited by 45 publications

References 85 publications

High-Capacity Directly Modulated Optical Transmitter for 2-μm Spectral Region

High-Capacity Directly Modulated Optical Transmitter for 2-μm Spectral Region

Highly efficient frequency doubling and quadrupling of a short-pulsed thulium fiber laser

High gain holmium-doped fibre amplifiers

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