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Power Efficient Current Driver Based on Negative Boosting for High-Speed Lasers

1
Department of Electronics Engineering, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju 28644, Korea
2
Department of Electrical and Computer Engineering, COMSATS University Islamabad, Park Road, Tarlai Kalan, Islamabad 45550, Pakistan
3
Department of Electrical and Computer Engineering, COMSATS University Islamabad, Abbottabad Campus, University Road, Tobe Camp, Abbottabad 22060, Pakistan
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(11), 1309; https://doi.org/10.3390/electronics8111309
Received: 30 September 2019 / Revised: 20 October 2019 / Accepted: 6 November 2019 / Published: 8 November 2019
(This article belongs to the Section Quantum Electronics)
Vertical-cavity surface-emitting lasers (VCSELs) are commonly used in high-speed optical communication and 3D sensing applications. Both of these applications require high switching frequency and a short rise time of the VCSEL current. The parasitic inductance of the wire (connecting the driver with VCSEL) makes it challenging to achieve a short rise time, which often incur increased supply voltage and excessive power consumption. This paper utilizes a momentary boosting in supply voltage to overcome the parasitic inductance of the wire with minimal power overhead. The proposed technique uses a precalculated boosting capacitance to produce negative voltage for common-anode VCSELs. The boosting capacitance provides the required amount of charge during the rising transition and automatically disconnects itself in steady-state. Circuit simulations reveal up to three times shorter rise time at the negligible cost of less than 10% power overhead. View Full-Text
Keywords: CMOS laser drivers; pulsed laser diode driver; vertical cavity surface emitting lasers (VCSEL); negative supply boosting; switching circuits CMOS laser drivers; pulsed laser diode driver; vertical cavity surface emitting lasers (VCSEL); negative supply boosting; switching circuits
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MDPI and ACS Style

Arslan, S.; Shah, S.A.A.; Kim, H. Power Efficient Current Driver Based on Negative Boosting for High-Speed Lasers. Electronics 2019, 8, 1309.

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