${\rm In}_{0.75}{\rm Ga}_{0.25}{\rm As}/{\rm InP}$ Multiple Quantum-Well Discrete-Mode Laser Diode Emitting at 2 $\mu{\rm m}$

Phelan, Richard; O’Carroll, John; Byrne, Diarmuid; Herbert, C.; Somers, Jim; Kelly, Brian

doi:10.1109/lpt.2012.2185689

Cited by 51 publications

(30 citation statements)

References 11 publications

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“…The transmitter consisted of four directly modulated (1967.6, 1977.8, 1986.9, and 1992.5 nm) lasers and another four externally modulated (1995.7, 1998.4, 2001.9, and 2003.9 nm) channels. The lasers used were based on highly strained In 0.75 Ga 0.25 As multiple quantum well, ridge waveguide laser diode structures grown on InP substrates and designed for single mode operation at these wavelengths [10]. In order to directly modulate the lasers at the highest baud rate possible, S 21 frequency response was analyzed for each laser depending on the bias current.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

“…Thulium-doped fiber amplifiers (TDFA) which operate over a wide bandwidth spanning from ~1.80 µm to 2.05 µm are also available at this waveband [9] and their use in a transmission experiment has been demonstrated [5]. Moreover, the increasing availability of telecommunication-grade optical components at 2 µm, such as lasers [10], modulators and photo-detectors (PD) [11], are making transmission experiments at 2 µm practical. We previously presented in [4] that either direct laser modulation, or external modulation can be implemented in the 2 µm region, and successfully demonstrated the first WDM transmission experiment over 290 m of HC-PBGF.…”

Section: Introductionmentioning

confidence: 99%

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100 Gbit/s WDM transmission at 2 µm: transmission studies in both low-loss hollow core photonic bandgap fiber and solid core fiber

Zhang¹,

Kavanagh²,

Li³

et al. 2015

Opt. Express

116

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Abstract:We show for the first time 100 Gbit/s total capacity at 2 µm waveband, using 4 × 9.3 Gbit/s 4-ASK Fast-OFDM direct modulation and 4 × 15.7 Gbit/s NRZ-OOK external modulation, spanning a 36.3 nm wide wavelength range. WDM transmission was successfully demonstrated over 1.15 km of low-loss hollow core photonic bandgap fiber (HC-PBGF) and over 1 km of solid core fiber (SCF). We conclude that the OSNR penalty associated with the SCF is minimal, while a ~1-2 dB penalty was observed after the HC-PBGF probably due to mode coupling to higher-order modes. 594-596 (2011).

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Section: Experimental Setup and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

100 Gbit/s WDM transmission at 2 µm: transmission studies in both low-loss hollow core photonic bandgap fiber and solid core fiber

Zhang¹,

Kavanagh²,

Li³

et al. 2015

Opt. Express

116

View full text Add to dashboard Cite

show abstract

“…The master laser was an In0.75Ga0.25As multiple quantum-well discrete-mode laser diode [13] with inbuilt dual-stage isolator emitting 3 dBm of CW light at 2003.4 nm. In our experiments we found that the highest back-to-back capacity required slightly larger master laser power (7-8 dBm).…”

Section: Transmission Experiments Setupmentioning

confidence: 99%

“…Key components such as narrow linewidth lasers [13], external modulators, optical hybrids [14], high-speed photo detectors [15], as well as many passive components have already been developed for 2 µm region. With the availability of these building blocks, 2 µm fiber transmission systems have now been demonstrated and the transmission capacity has been consistently improved, although all experiments to date have been limited to simple data coding only.…”

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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“…2 shows an operational diagram of the proposed approach; some minor details are omitted for clarity. A 1.654 µm narrow-linewidth fiber-coupled discrete-mode (DM) laser is employed, whose salient features are detailed in [35] for a similar device operating at 2 µm. The modulation characteristics of the DM laser structure, originally intended for telecommunications applications [34], together with a very narrow wavelength range, were identified as being ideal for photoacoustic swept-wavelength measurements.…”

Section: B Laser Selectionmentioning

confidence: 99%

A Robust Method for Tuning Photoacoustic Gas Detectors

Leis

Buttsworth

2018

IEEE Trans. Ind. Electron.

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Abstract-Detection of gases in industrial contexts is of great importance for ensuring safety in storage and transport, so as to limit atmospheric pollution and precisely control industrial and agricultural processes. Although chemical sensors are in widespread use, solidstate infrared detectors for gas sensing promise numerous advantages over conventional catalytic detectors in terms of sensitivity, calibration requirements, and lifetime. The laser-modulation photoacoustic approach is an alternative. Compared to other approaches, it provides more precise measurements with a stable zero baseline, as well as having significantly less complicated optics than cavity ringdown approaches. One enduring problem, though, is the relatively long time required to make photoacoustic measurements. The key contribution of this paper to the industrial context is twofold: first, we show how a sensitive dual-buffer acoustic resonator may be fabricated using 3D printing, and secondly we describe a method for localizing the peak absorption more rapidly than stepping a laser through the gas absorption profile. Modelling of the proposed approach demonstrates its potential, and the expected results are confirmed using an extensive experimental setup for the detection of methane in air.Index Terms-gas leak detection, infrared detectors, natural gas industry

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${\rm In}_{0.75}{\rm Ga}_{0.25}{\rm As}/{\rm InP}$ Multiple Quantum-Well Discrete-Mode Laser Diode Emitting at 2 $\mu{\rm m}$

Cited by 51 publications

References 11 publications

100 Gbit/s WDM transmission at 2 µm: transmission studies in both low-loss hollow core photonic bandgap fiber and solid core fiber

100 Gbit/s WDM transmission at 2 µm: transmission studies in both low-loss hollow core photonic bandgap fiber and solid core fiber

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

A Robust Method for Tuning Photoacoustic Gas Detectors

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