High k-space lasing in a dual-wavelength quantum cascade laser

Franz, Kale J.; Menzel, S.; Hoffman, Anthony J.; Wasserman, D.; Cockburn, J. W.; Gmachl, Claire F.

doi:10.1038/nphoton.2008.250

Cited by 11 publications

(7 citation statements)

References 22 publications

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“…Among the notable designs, the following can be mentioned: Two consecutive optical transitions between three energy levels, 6 multiple-wavelength superlattice QC laser, 7 QC laser with alternative design approach containing five different material composition, 8 QC laser with two substacks region, [9][10][11] and QC laser with high k-space lasing. 12 In a QC laser, the delay time plays an important role that partly determines the device's performance and has already been investigated theoretically in the case of a single mode system. 13,14 For single mode QC lasers, the strong decrease of the delay time with current was then attributed to the dependence of the turn-on delay and buildup times on current injection.…”

Section: Introductionmentioning

confidence: 99%

Delay time calculation for dual-wavelength quantum cascade lasers

Hamadou

Lamari

Thobel

2013

Journal of Applied Physics

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In this paper, we calculate the turn-on delay (t th ) and buildup (Dt) times of a midinfrared quantum cascade laser operating simultaneously on two laser lines having a common upper level. The approach is based on the four-level rate equations model describing the variation of the electron number in the states and the photon number present within the cavity. We obtain simple analytical formulae for the turn-on delay and buildup times that determine the delay times and numerically apply our results to both the single and bimode states of a quantum cascade laser, in addition the effects of current injection on t th and Dt are explored. V

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Section: Introductionmentioning

confidence: 99%

Delay time calculation for dual-wavelength quantum cascade lasers

Hamadou

Lamari

Thobel

2013

Journal of Applied Physics

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“…(13a) and (13b), making use of Eqs. (12) and (19) and neglecting terms of orders higher than one we obtain the differential equations that govern the time evolution of the fluctuations in photon numbers around their steady-state values. These linearized first order equations read as…”

Section: General Considerationsmentioning

confidence: 99%

“…Among the notable designs, the following can be mentioned: Two consecutive optical transitions between three energy levels [6], multiple-wavelength superlattice QC laser [7], QC laser with alternative design approach containing five different material composition [8], QC laser with two substacks region [9][10][11] and QC laser with high k-space lasing [12].…”

Section: Introductionmentioning

confidence: 99%

Rate equations analysis of a dual-wavelength quantum cascade laser

Hamadou

Thobel

Lamari

2013

Optics Communications

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“…The device parameters significantly influence the performance of QCLs as reported in Reference 3. Many implementations for dual wavelength‐quantum cascade lasers (DW‐QCLs) have been proposed 4–10 . QCLs operating at multiple wavelengths are used in LIDAR (Light Detection and Ranging) based ranging 11,12 and many such applications.…”

Section: Introductionmentioning

confidence: 99%

“…Many implementations for dual wavelength-quantum cascade lasers (DW-QCLs) have been proposed. [4][5][6][7][8][9][10] QCLs operating at multiple wavelengths are used in LIDAR (Light Detection and Ranging) based ranging 11,12 and many such applications. The unique design of DW-QCLs allows them to be used in a wide range of applications, including chemical sensing, environmental monitoring, and medical diagnostics.…”

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confidence: 99%

Novel coding schemes for dual wavelength quantum cascade laser‐based free space optical links

Ashok

Madhan

Raja

et al. 2023

Int J Numerical Modelling

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Dual wavelength quantum cascade lasers (DW‐QCLs) are a type of semiconductor laser that can emit two different wavelengths of light simultaneously. They are constructed using quantum cascade structures, consisting of multiple layers of semiconductor materials carefully engineered to produce the desired wavelengths of light. This research article reports the numerical simulation and evaluation of the maximum capacity of free space optical (FSO) link employing novel coding schemes for DW‐QCL‐based pulsed optical transmitters. A 48‐stage DW‐QCL emitting at 10.5 and 8.9 μm wavelengths and a Quantum‐Well based Infrared Photodetector based receiver are considered for the study. The performance of the link is analyzed under short pulse transmission from the device at both wavelengths for various scenarios. Optical pulses are obtained either at a single wavelength or two different wavelengths by proper choice of electrical input current amplitude. This feature enables the implementation of four different coding schemes. Among the various coding approaches proposed, the scheme, which operates on symbols, performs the best, providing a maximum link length of 1700m, for a BER of 10−9.

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High k-space lasing in a dual-wavelength quantum cascade laser

Cited by 11 publications

References 22 publications

Delay time calculation for dual-wavelength quantum cascade lasers

Delay time calculation for dual-wavelength quantum cascade lasers

Rate equations analysis of a dual-wavelength quantum cascade laser

Novel coding schemes for dual wavelength quantum cascade laser‐based free space optical links

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