Demonstration of amplified data transmission at 2 µm in a low-loss wide bandwidth hollow core photonic bandgap fiber

Petrovich, M. N.; Poletti, F.; Wooler, J. P.; Heidt, Alexander M.; Baddela, N. K.; Li, Z; Gray, D. R.; Slavı́k, Radan; Parmigiani, Francesca; Wheeler, Natalie V.; Hayes, J. R.; Numkam, E.; Grüner-Nielsen, L.; Pálsdóttir, B.; Phelan, Richard; Kelly, Brian; O’Carroll, John; Becker, Martin; MacSuibhne, Naoise; Zhao, Jian; Gunning, Fatima C. Garcia; Ellis, A.D.; Petropoulos, P.; Alam, Shaif-ul; Richardson, David J.

doi:10.1364/oe.21.028559

Cited by 117 publications

(54 citation statements)

References 22 publications

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“…The fiber has in this case a minimum loss of ~ 3 dB/km at 2010 nm and a remarkable width bandwidth of 160 nm (1936-2096nm). Further details of this fiber are given in [21]. Both samples were pigtailed with SMF-28 with an estimated splice loss of 3 dB at each end arising primarily from mode-mismatch.…”

Section: Transmission Experiments Setupmentioning

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: Transmission Experiments Setupmentioning

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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“…The atmospheric transmission window also includes the 2-mm region, unlocking the way to energy delivery 6 or free-space communications 7 . Recently, the potential of hollow-core photonic bandgap fibers 8 combined with thulium-doped fiber (TDF) amplifiers 9 for fiber optical telecommunication in the 1910-2020 nm band was reported. Furthermore, the 2-mm spectral range is also widely used to pump holmium-doped fibers 10 or to drive nonlinear processes in the mid-infrared region 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Isolator-free unidirectional thulium-doped fiber laser

Kharitonov

Brès

2015

Light Sci Appl

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We report the first demonstration of a unidirectional, isolator-free 2-mm thulium-doped fiber (TDF) laser, relying on the properties of the theta cavity (ring resonator with S-shaped feedback). The core pumped theta cavity TDF laser provides sub-Watt output power with a slope efficiency of 25%, a 2 dB flat tuning range of 1900-2050 nm, and a linewidth of 0.2 nm, and achieves the extinction ratio of 18-25 dB (depending on the feedback value) between the favored and suppressed lasing directions. It is shown that these characteristics are competitive with, if not superior to, those of conventional ring cavities. The simulation results of the linear and Kerr-nonlinear theta cavities are also presented, explaining certain unexpected features of the laser behavior and establishing the importance of the doped fiber nonlinearity on the spectral shaping of the emitted signal.

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“…HCPBGFs, with a minimum loss observed around 2 μm, offer a radical solution to increase transmission capacity per fiber, decrease fiber loss and nonlinearity, and reduce signal latency when compared to the state-of-the-art in the traditional 18 communication bands. *Corresponding author email address: clittlejohns@ntu.edu.sg…”

Section: Introductionmentioning

confidence: 99%

All silicon approach to modulation and detection at λ = 2 µm

Littlejohns

Nedeljkovic

Cao

et al. 2018

Optical Interconnects XVIII

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Silicon photonics has traditionally focused on near infrared wavelengths, with tremendous progress seen over the past decade. However, more recently, research has extended into mid infrared wavelengths of 2 µm and beyond. Optical modulators are a key component for silicon photonics interconnects at both the conventional communication wavelengths of 1.3 µm and 1.55 µm, and the emerging mid-infrared wavelengths. The mid-infrared wavelength range is particularly interesting for a number of applications, including sensing, healthcare and communications. The absorption band of conventional germanium photodetectors only extends to approximately 1.55 µm, so alternative methods of photodetection are required for the mid-infrared wavelengths. One possible CMOS compatible solution is a silicon defect detector. Here, we present our recent results in these areas. Modulation at the wavelength of 2 µm has been theoretically investigated, and photodetection above 25 Gb/s has been practically demonstrated.

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Demonstration of amplified data transmission at 2 µm in a low-loss wide bandwidth hollow core photonic bandgap fiber

Cited by 117 publications

References 22 publications

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

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

Isolator-free unidirectional thulium-doped fiber laser

All silicon approach to modulation and detection at λ = 2 µm

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