Time resolved FTIR study of spectral tuning and thermal dynamics of mid-IR QCLs

Pierściński, Kamil; Pierścińska, Dorota; Szabra, D.; Nowakowski, M.; Wojtas, J.; Mikołajczyk, J.; Bielecki, Z.; Bugajski, M.

doi:10.1117/12.2052206

Cited by 8 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phase sensitive detection of the optical response was performed using a lock-in amplifier. A similar FT-based approach has been demonstrated to be an efficient tool for optical characterization in the mid-infrared spectral range of narrow-band gap materials (Hosea et al 2005;Shao et al 2007) as well as quantum cascade lasers (Dyksik et al 2016;Pierscinski et al 2014).…”

mentioning

confidence: 99%

Photoluminescence quenching mechanisms in type II InAs/GaInSb QWs on InAs substrates

et al. 2016

View full text Add to dashboard Cite

Optical properties of AlSb/InAs/GaInSb/InAs/AlSb quantum wells (QWs) grown on an InAs substrate were investigated from the point of view of room temperature emission in the mid-and long-wavelength infrared ranges. By means of two independent techniques of optical spectroscopy, photoreflectance and temperature-dependent photoluminescence, it was proven that the main process limiting the performance of such InAs substrate-based type II structures is related to the escape of carriers from the hole ground state of the QW. Two nonradiative recombination channels were identified. The main process was attributed to holes tunneling to the valence band of the GaAsSb spacing layer and the second one with trapping of holes by native defects located in the same layer.

show abstract

mentioning

confidence: 99%

Photoluminescence quenching mechanisms in type II InAs/GaInSb QWs on InAs substrates

et al. 2016

View full text Add to dashboard Cite

show abstract

“…To confirm the performance and spectral behavior of the 3-section devices, detailed measurements were performed. Characterization included standard light-current-voltage (L-I-V) measurements [20], as well as spectral and TRS characterization [21]. Time-resolved spectral measurements were used to specifically characterize the spectral tuning of the emission during the pulse duration.…”

Section: Resultsmentioning

confidence: 99%

Monolithic, Optically Coupled, Multi-Section Mid-IR Quantum Cascade Lasers

Pierściński¹,

Pierścińska²,

Sobczak³

et al. 2021

Photonics

View full text Add to dashboard Cite

Mid-infrared (mid-IR λ ≈ 3–12 μm), single-mode-emission Quantum Cascade Lasers (QCLs) are of significant interest for a wide range of applications, especially as the laser sources are chosen for laser absorption spectroscopy. In this work, we present the design, fabrication and characterization of multi-section, coupled-cavity, mid-IR quantum cascade lasers. The purpose of this work is to propose a design modification for a coupled-cavity device, yielding a single-mode emission with a longer range of continuous tuning during the pulse, in contrast to a 2-section device. This effect was obtained and demonstrated in the work. The proposed design of a 3-section coupled-cavity QCL allows for a single-mode emission with 35 dB side-mode suppression ratio. Additionally, the time-resolved spectra of the wavelength shift during pulse operation, show a continuous tuning of ~3 cm−1 during the 2 μs pulse. The devices were fabricated in a slightly modified, standard laser process using dry etching.

show abstract

“…The spectral resolution of the spectrometer was 0.125 cm -1 . The time resolved spectral (TRS) measurements were performed with 5 ns time resolution [30]. For all measurements, the LS of the QCL was driven by power supply.…”

Section: Resultsmentioning

confidence: 99%

Coupled Cavity Mid-IR Quantum Cascade Lasers Fabricated by Dry Etching

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this work, two-section, coupled cavity, mid-IR quantum cascade lasers (QCLs) were characterized in terms of their tuning range and emission stability under operation towards potential application in detection systems. Devices were processed by inductively coupled plasma reactive ion etching (ICP-RIE) from InP-based heterostructure, designed for emission in the 9.x micrometer range. Single mode devices were demonstrated with a better than 20 dB side mode suppression ratio (SMRS). The fabrication method resulted in improved yield, as well as high repeatability of individual devices. Continuous, mode-hop-free tuning of emission wavelength was observed across ~4.5 cm−1 for the range of temperatures of the heat sink from 15 °C to 70 °C. Using the thermal perturbation in the lasing cavity, in conjunction with controlled hopping between coupled-cavity (CC) modes, we were able to accomplish tuning over the range of up to ~20 cm−1.

show abstract

Time resolved FTIR study of spectral tuning and thermal dynamics of mid-IR QCLs

Cited by 8 publications

References 20 publications

Photoluminescence quenching mechanisms in type II InAs/GaInSb QWs on InAs substrates

Photoluminescence quenching mechanisms in type II InAs/GaInSb QWs on InAs substrates

Monolithic, Optically Coupled, Multi-Section Mid-IR Quantum Cascade Lasers

Coupled Cavity Mid-IR Quantum Cascade Lasers Fabricated by Dry Etching

Contact Info

Product

Resources

About