Print Email Facebook Twitter Real-Time Measurements of Photonic Microchips with Femtometer-Scale Spectral Precision and Ultrahigh Sensitivity Title Real-Time Measurements of Photonic Microchips with Femtometer-Scale Spectral Precision and Ultrahigh Sensitivity Author Dashtabi, Mahdi Mozdoor (Vrije Universiteit Amsterdam) Khoshmehr, Mohammad Talebi (Vrije Universiteit Amsterdam) Nikbakht, Hamed (Vrije Universiteit Amsterdam) Lopez Rodriguez, B. (TU Delft ImPhys/Esmaeil Zadeh group) Sharma, N. (TU Delft ImPhys/Esmaeil Zadeh group) Esmaeil Zadeh, I.Z. (TU Delft ImPhys/Esmaeil Zadeh group) Akca, B. Imran (Vrije Universiteit Amsterdam) Date 2024 Abstract Photonic integrated circuits (PICs) are enabling breakthroughs in several areas, including quantum computing, neuromorphic processors, wearable devices, and more. Nevertheless, existing PIC measurement methods lack the spectral precision, speed, and sensitivity required for refining current applications and exploring new frontiers such as point-of-care or wearable biosensors. Here, the “sweeping optical frequency mixing method (SOHO)” is presented, surpassing traditional PIC measurement methods with real-time operation, 30 dB higher sensitivity, and over 100 times better spectral resolution. Leveraging the frequency mixing process with a sweeping laser, SOHO excels in simplicity, eliminating the need for advanced optical components and additional calibration procedures. Its superior performance is demonstrated on ultrahigh-quality factor (Q) fiber-loop resonators (Q = 46 × 106), as well as microresonators, realized on a new optical waveguide platform. An experimental spectral resolution of 19.1 femtometers is demonstrated using an 85-meter-long unbalanced fiber Mach Zehnder Interferometer, constrained by noise resulting from the extended fiber length, while the theoretical resolution is calculated to be 6.2 femtometers, limited by the linewidth of the reference laser. With its excellent performance metrics, SOHO has the potential to become a vital measurement tool in photonics, excelling in high-speed and high-resolution measurements of weak optical signals. Subject frequency mixingphotonic integrated circuitsreal-timesweeping laser To reference this document use: http://resolver.tudelft.nl/uuid:b282eb7c-f622-4068-82e1-66c6f5c359ae DOI https://doi.org/10.1002/lpor.202301396 ISSN 1863-8880 Source Laser and Photonics Reviews Part of collection Institutional Repository Document type journal article Rights © 2024 Mahdi Mozdoor Dashtabi, Mohammad Talebi Khoshmehr, Hamed Nikbakht, B. Lopez Rodriguez, N. Sharma, I.Z. Esmaeil Zadeh, B. Imran Akca Files PDF Laser_Photonics_Reviews_- ... ectral.pdf 2.78 MB Close viewer /islandora/object/uuid:b282eb7c-f622-4068-82e1-66c6f5c359ae/datastream/OBJ/view