Demonstration of Vernier effect tuning in tunable twin-guide laser diodes

Todt, R.; Jacke, T.; Laroy, Reinhard; Morthier, Geert; Amann, M.-C.

doi:10.1049/ip-opt:20045018

Cited by 11 publications

(10 citation statements)

References 15 publications

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“…While IR laser absorption spectroscopy has traditionally focused on single-species detection, extending the tunable wavelength range enables mul-tispecies detection with a single laser source. Dual-wavelength distributed feedback (DFB) QCLs or lasers implementing Vernier-effect tuning are integrated light sources that have turned this into a reality, thus expanding the range and applicability of such lasers [18][19][20]. Further extension of the tunable range of QCLs has used a Fabry-Perot QCL chip in an external-cavity (EC) system, where the laser could be tuned across the whole gain curve.…”

Section: Light Sources 211 Ir Absorption Spectroscopymentioning

confidence: 99%

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Alberti

Datta

Jágerská

2021

Sensors

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On-chip devices for absorption spectroscopy and Raman spectroscopy have been developing rapidly in the last few years, triggered by the growing availability of compact and affordable tunable lasers, detectors, and on-chip spectrometers. Material processing that is compatible with mass production has been proven to be capable of long low-loss waveguides of sophisticated designs, which are indispensable for high-light–analyte interactions. Sensitivity and selectivity have been further improved by the development of sorbent cladding. In this review, we discuss the latest advances and challenges in the field of waveguide-enhanced Raman spectroscopy (WERS) and waveguide infrared absorption spectroscopy (WIRAS). The development of integrated light sources and detectors toward miniaturization will be presented, together with the recent advances on waveguides and cladding to improve sensitivity. The latest reports on gas-sensing applications and main configurations for WERS and WIRAS will be described, and the most relevant figures of merit and limitations of different sensor realizations summarized.

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Section: Light Sources 211 Ir Absorption Spectroscopymentioning

confidence: 99%

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Alberti

Datta

Jágerská

2021

Sensors

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“…Integrated sampled grating reflectors using the Vernier effect were demonstrated to extend the tuning range of the emission wavelength of semiconductor lasers [32,33]. This approach was successfully applied to QCLs with multiple sections [34][35][36][37].…”

Section: Vernier Based Dual-wavelength Dfb Qcls At 526 and 625 Mmentioning

confidence: 99%

Dual-wavelength DFB quantum cascade lasers: sources for multi-species trace gas spectroscopy

et al. 2018

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We report on the design, fabrication, and performance of dual-wavelength distributed-feedback (DFB) quantum cascade lasers (QCLs) emitting at several wavelengths in the mid-infrared (mid-IR) spectrum. In this work, two new designs are presented: for the first one, called "Neighbour" DFB, two single-mode DFB QCLs are fabricated next to each other, with minimal lateral distance, to allow efficient beam-coupling into multi-pass gas cells. In addition, the minimal distance allows either laser to be used as an integrated heater for the other, allowing to extend the tuning range of its neighbour without any electrical cross-talk. For the second design, the Vernier effect was used to realize a switchable DFB laser, with two target wavelengths which are distant by about 300 cm −1. These devices are promising laser sources for Tunable Diode Laser Absorption Spectroscopy applications targeting simultaneous detection of multiple gasses, with distant spectral features, in compact and mobile setups. This article is part of the topical collection "Mid-infrared and THz Laser Sources and Applications" guest edited by Wei Ren, Paolo

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“…We validate this novel laser design paradigm by demonstrating a VCSEL design following a hexagonal multi-cavity approach showing a bandwidth of about 45 GHz, which is an about five times improvement over 'conventional' VCSEL designs realized on the same wafer. Beyond speed performance, the MTCC paradigm can further be used to increase the laser power output; to achieve high-power at single-mode operation, the Vernier effect in the hexagonal VCSEL can be used to form a wider laser aperture [28,29]. Following this design concept, we demonstrate single-mode operation with a high (>30 dB) side-mode suppression (SMSR) and prominent (>45 dB) signal-to-noise ratio (SNR).…”

Section: Introductionmentioning

confidence: 99%

Hexagonal transverse-coupled-cavity VCSEL redefining the high-speed lasers

Heidari

Dalir

Ahmed³

et al. 2020

Nanophotonics

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Vertical-cavity surface-emitting lasers (VCSELs) have emerged as a vital approach for realizing energy-efficient and high-speed optical interconnects in the data centers and supercomputers. Indeed, VCSELs are the most suitable mass production lasers in terms of cost-effectiveness and reliability. However, there are still key challenges that prevent achieving modulation speeds beyond 30s GHz. Here, we propose a novel VCSEL design of a hexagonal transverse-coupled-cavity adiabatically coupled through a central cavity. Following this scheme, we show a prototype demonstrating a 3-dB roll-off modulation bandwidth of 45 GHz, which is five times greater than a conventional VCSEL fabricated on the same epiwafer structure. This design harnesses the Vernier effect to increase the laser’s aperture and therefore is capable of maintaining single-mode operation of the laser for high injection currents, hence extending the dynamic roll-off point and offering increases power output. Simultaneously, extending both the laser modulation speed and output power for this heavily deployed class of lasers opens up new opportunities and fields of use ranging from data-comm to sensing, automotive, and photonic artificial intelligence systems.

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Demonstration of Vernier effect tuning in tunable twin-guide laser diodes

Cited by 11 publications

References 15 publications

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Integrated Nanophotonic Waveguide-Based Devices for IR and Raman Gas Spectroscopy

Dual-wavelength DFB quantum cascade lasers: sources for multi-species trace gas spectroscopy

Hexagonal transverse-coupled-cavity VCSEL redefining the high-speed lasers

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