Citation: Z. Li et al., “Miniaturized Laser Diode Driver and Microwave Source for Transportable Quantum Sensors,” 2024 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), Taipei, Taiwan, 2024, pp. 344-348
Authors: Zheyi Li, SinNyoung Kim; Reza Tavakoli Dinani; Yijing Zhang; Ilker Eryilmaz; Laurent Berti, Milos Nesladek
Published in: 2024 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
Publisher: IEEE
Conference Location: Taipei, Taiwan
Date of Conference: 07-09 November 2024
DOI: 10.1109/APCCAS62602.2024.10808645
Abstract:
The nitrogen-Vacancy (NV) defect center is a promising tool to build magnetic sensors for space applications. This paper presents an ASIC solution of two key blocks in such a sensor: a laser diode driver (LDD) and a microwave (MW) source by a voltage-controlled oscillator (VCO) structure. This application requires that LDD has a wide driving current tuning range and enables a stable LD power insensitive to temperature changes. It also requires that the VCO can generate the MW frequency with three tunable parameters (carrier, modulation and deviation frequency) by a stand-alone design. Designed in a 65-nm technology, the LDD achieves a current tunable from 88.2 mA to 311.3 mA and shows only 0.17 mW deviation at 80 mW working power across a temperature range of 60∘C, and the VCO could reach a carrier frequency range of 2.37 GHz to 3.25 GHz with a modulation frequency of up to 5 MHz and a deviation frequency of up to 6 MHz, according to the post-layout simulation. The two blocks now only occupy an area of 0.79 mm2 and a power consumption of 4.8 mW, which paves the way for a compact, transportable NV magnetic sensor suitable for future space exploration.