Compact Dual-Wavelength InAs/GaAs Quantum-Dot External-Cavity Laser Stabilized by a Single Volume Bragg Grating

Daghestani, Nart; Cataluna, Maria Ana; Ross, G.W.; Rose, M. J.

doi:10.1109/lpt.2010.2096206

Cited by 13 publications

(8 citation statements)

References 14 publications

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“…Moreover, the temperature resilience offered by QD lasers has also enabled the demonstration of wide eye patterns at 25 Gb/s, at temperatures between 40 °C and 80 °C, using the filtered individual modes of a QD comb laser [86]. It was observed that due to the broadband gain, even with the increase in temperature, the same wavelengths remained locked, which matches results previously reported in the context of dual−wavelength QD ECLs coupled with multiplexed volume Bragg gratings [77].…”

Section: Applicationssupporting

confidence: 81%

“…One such system utilized a double−Littman configuration ECL [46], achieving a maximum wavelength separation of 126 nm for dual lasing, which represents over 25 THz in frequency difference. QD−based lasers have particularly proved their worth in dual−wavelength sources, as due to their broad gain bandwidth, the lasers can remain locked in the dual−wavelength emission regime at a wide range of bias currents and increased temperatures [77], which would be of interest for the uncooled operation of such devices, further reducing complexity, cost and electrical power consumption.…”

Section: Applicationsmentioning

confidence: 99%

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Unlocking Spectral Versatility from Broadly−Tunable Quantum−Dot Lasers

White

Cataluna

2015

Photonics

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Wavelength−tunable semiconductor quantum−dot lasers have achieved impressive performance in terms of high−power, broad tunability, low threshold current, as well as broadly tunable generation of ultrashort pulses. InAs/GaAs quantum−dot−based lasers in particular have demonstrated significant versatility and promise for a range of applications in many areas such as biological imaging, optical fiber communications, spectroscopy, THz radiation generation and frequency doubling into the visible region. In this review, we cover the progress made towards the development of broadly−tunable quantum−dot edge−emitting lasers, particularly in the spectral region between 1.0-1.3 µm. This review discusses the strategies developed towards achieving lower threshold current, extending the tunability range and scaling the output power, covering achievements in both continuous wave and mode−locked InAs/GaAs quantum−dot lasers. We also highlight a number of applications which have benefitted from these advances, as well as emerging new directions for further development of broadly−tunable quantum−dot lasers.

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Section: Applicationssupporting

confidence: 81%

Section: Applicationsmentioning

confidence: 99%

Unlocking Spectral Versatility from Broadly−Tunable Quantum−Dot Lasers

White

Cataluna

2015

Photonics

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“…Although optical phase locked loop sources can generate narrow linewidths of a few Hertz [9], a very narrow linewidth (10 Hz) optical frequency comb generator is required to be used as a reference. Linewidth narrowing has been achieved with external cavities, which, while reliable, involve bulky components such as Fabry‐Perot resonators [2] and a volume Bragg fibre grating [10]. Line narrowing of a monolithic device by using four‐wave mixing has also been proposed [11].…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of line narrowing in a sub‐terahertz monolithic dual laser source with an integrated reflector

Yang

Wonfor

Penty

et al. 2014

IET Optoelectronics

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A monolithic design is proposed for low-noise sub-THz signal generation by integrating a reflector onto a dual laser source. The reflectivity and the position of such a reflector can be adjusted to obtain constructive feedback from the reflector to both lasers, thus causing a Vernier feedback effect. As a result, 10-fold line narrowing, the narrowing being limited by the resolution of the simulation, is predicted using a transmission line model. Finally, a simple control scheme using an electrical feedback loop to adjust laser biases is proposed to maintain the line narrowing performance. This line narrowing technique, comprising a passive integrated reflector, could allow the development of a low-cost, compact and energy-efficient solution for high-purity sub-THz signal generation.

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“…Dual-wavelength generation was reported with a maximum output power of 186 mW and a stable spectral separation of 0.62 THz from a quantum-dot-based medium that used a single VBG. 18) Zolotovskaya et al demonstrated both continuous-wave single-and dual-wavelength generations with a narrow bandwidth of 0.33 nm and a stable spectral separation ranging from 0.16 to 2.05 THz from a broad-area LD when using five VBGs at a drive current of 3 A. 19) In 2011, Chi et al reported that the frequency difference between the two wavelengths of their dual-wavelength laser was tunable from 0.5 to 5 THz when using a tapered amplifier with two diffraction gratings.…”

mentioning

confidence: 99%

Continuous-wave dual-wavelength operation of a distributed feedback laser diode with an external cavity using a volume Bragg grating

Zheng

Sekine

Kitahara

et al. 2018

Jpn. J. Appl. Phys.

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We demonstrate continuous-wave dual-wavelength operation of a broad-area distributed feedback (DFB) laser diode with a single external-cavity configuration. This high-power DFB laser has a narrow bandwidth (<0.29 nm) and was used as a single-wavelength source. A volume Bragg grating was used as an output coupler for the external-cavity DFB laser to output another stable wavelength beam with a narrow bandwidth of 0.27 nm. A frequency difference for dual-wavelength operation of 0.88 THz was achieved and an output power of up to 415 mW was obtained. The external-cavity DFB laser showed a stable dual-wavelength operation over the practical current and temperature ranges.© 2018 The Japan Society of Applied Physics H igh-power broad-area laser diodes (LDs) are the most commonly used optical sources in a wide range of applications because of their compact size, high efficiency, and low cost. However, the spectral linewidths of Fabry-Perot LDs are typically in the 2-4 nm range, which is too wide for some of the more demanding LD applications, including solid-state laser pumping, 1,2) alkalivapor laser pumping, [3][4][5][6] and spin-exchange optical pumping. 7,8) Spectrum narrowing has been achieved in high-power LDs using both internal and external techniques. Externalcavity techniques using volume Bragg gratings (VBGs) [9][10][11][12] have been used to narrow the spectral linewidths of these LDs to the 0.014-0.4 nm range. In 2011, Vijayakumar et al. reported an output power of 5 W with a narrow linewidth of 0.2 nm from a VBG-coupled tapered LD bar.13) We have recently a reported reduction in the spectral bandwidth of spatial beam-combining high-power LD stacks to 0.31 nm, with a 581 W peak power output for quasicontinuous wave operation when using a single VBG.14) However, complete locking of the wavelength for continuous-wave broad-area LDs is difficult in the practical current and temperature ranges because of the wavelength thermal shift of high-power LDs. 1,9,12) Another potential linewidth reduction measure involves direct integration of a Bragg grating into the internal laser cavity. An output power of 1.1 W with a spectral width of 90 pm has been reported for continuous-wave 893 nm distributed feedback (DFB) lasers.15) In 2013, Garrod et al. reported high-efficiency 1 W output continuous-wave DFB lasers that operated at 1.4 µm with a linewidth of 0.5 nm, and the wavelength thermal shift of the DFB lasers (0.1 nm=°C) was much smaller than that of the broad-area LDs (0.45 nm=°C) in a temperature range of 10 to 30°C.16) Recently, we have reported a stable-spectrum DFB LD with a narrow linewidth of 33 pm that used a VBG. 17)Dual-wavelength lasers have also been rapidly developed for a wide variety of applications, including THz-wave generation, interferometry, and imaging systems. Dual-wavelength operation has also been achieved in LDs using external techniques. Dual-wavelength generation was reported with a maximum output power of 186 mW and a stable spectral separation of 0.62 THz from a quantum-dot-based medium t...

show abstract

Compact Dual-Wavelength InAs/GaAs Quantum-Dot External-Cavity Laser Stabilized by a Single Volume Bragg Grating

Cited by 13 publications

References 14 publications

Unlocking Spectral Versatility from Broadly−Tunable Quantum−Dot Lasers

Unlocking Spectral Versatility from Broadly−Tunable Quantum−Dot Lasers

Theoretical study of line narrowing in a sub‐terahertz monolithic dual laser source with an integrated reflector

Continuous-wave dual-wavelength operation of a distributed feedback laser diode with an external cavity using a volume Bragg grating

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