Abstract
In this work, the effect of SCH width on the modulation and distortion characteristics of tunnel injection transistor laserare analyzed. The rate equations of transistor laser are numerically solved using fourth order Runge Kutta method and the threshold current is found to reduce for increase in SCH width, in case of narrow SCH layer. A maximum modulation bandwidth of 21.8 GHz is predicted for aSCH width of 21 nm. However, at SCH width of 30 nm, a modulation depth of 0.44 is obtained, which is maximumcompared to other SCH widths. A minimum third order intermodulation distortion of − 39.6 dBc is obtained for SCH width of 21 nm. Further, anSFDR value of 79.6 dB Hz2/3 is observedfor the same width. Hence 21 nm SCH width is identified as an optimum value, which leads to minimum distortion and maximum bandwidth, for the TI-TL structure considered in this work.
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The authors gratefully acknowledge Anna University, Chennai for providing financial support to carry out this research work under Anna Centenary Research Fellowship (ACRF) scheme. One of the authors, S.V.V. is thankful to Anna University, Chennai for the award of Anna Centenary Research Fellowship [G.N.: CFR/ACRF/2018/34].
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S.V.V.—numerical simulation and overall alignment of research paper. S.P.—interpretation of results and overall correction of research work. M.G.M.—overall suggestions of the research work.
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Vinodhini, S.V., Piramasubramanian, S. & Ganesh Madhan, M. Investigations on the effect of separate confinement heterostructure width on the distortion performance of tunnel injection based transistor laser. Opt Quant Electron 55, 809 (2023). https://doi.org/10.1007/s11082-023-05076-1
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DOI: https://doi.org/10.1007/s11082-023-05076-1