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Optical and Quantum Electronics

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01-10-2023

Impact of optical device parameters on the performance characteristics of temperature dependent quantum cascade lasers

Authors: Abdulkarem H. M. Almawgani, B. Ramasubba Reddy, Turki Alsuwian, P. Ashok, C. R. Rathish, M. Ganesh Madhan

Published in: Optical and Quantum Electronics | Issue 10/2023

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Abstract

Temperature dependent Quantum Cascade Lasers are known for their advantages when compared to conventional lasers. In this work, we will focus on their temperature dependent capabilities. This research work reports the impact of optical device parameters on the transient and steady state dynamics of the device. Also, analysis on the analog modulation characteristics on the device is carried out in detail. The parameters namely terminal voltage (V), spontaneous emission factor (β), number of stages (M) and mirror reflectivity (R) are varied under different cold finger temperature conditions to evaluate their effect on the device characteristics. Bandwidth, maximum modulation depth, and corresponding frequency are investigated while the device is being powered by a haversine input current. From the analysis, it is found that as the cold finger temperature is increased, the lasing action is delayed leading to increase in threshold current irrespective of variation in any device parameter. Also, maximum Modulation Depth (MD) of 18% is obtained when T = 45 K and driven with 0.65 A current. When the injected current is 1.05 A at T = 15 K, maximum bandwidth of 27 GHz is produced. The minimum frequency to produce maximum MD increases with increase in current and cold finger temperatures.

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Title: Impact of optical device parameters on the performance characteristics of temperature dependent quantum cascade lasers
Authors: Abdulkarem H. M. Almawgani
B. Ramasubba Reddy
Turki Alsuwian
P. Ashok
C. R. Rathish
M. Ganesh Madhan
Publication date: 01-10-2023
Publisher: Springer US
Published in: Optical and Quantum Electronics / Issue 10/2023
Print ISSN: 0306-8919
Electronic ISSN: 1572-817X
DOI: https://doi.org/10.1007/s11082-023-05197-7

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