A high-performance DC–AC signal separated photodetector for photothermal heterodyne imaging (PHI)
A direct current-alternating current (DC-AC) separated photodiode detector has been developed and optimized for the signal characteristics of photothermal heterodyne imaging (PHI). The detector features a large photosensitive area (diameter = 5 mm), a flat frequency response, and a single-photodiode design. The gains of the DC and AC signal channels can be independently configured, for example, a gain of 103 for the DC signal and 105 for the AC signal. The cutoff frequency is set to 1.6 kHz, and the -3 dB bandwidth of transimpedance amplifier reaches about 5.8 MHz. This detector is easy to operate, highly resistant to external noise, and meets the imaging requirements of PHI experiments.
Authors
- Dou-Dou Ren (ORCID: https://orcid.org/0009-0000-9150-7816)
- Zhi‐Cong Zeng (ORCID: https://orcid.org/0000-0002-5997-5043)
- Tang-Xiu Li (ORCID: https://orcid.org/0009-0006-2154-5351)
- W. W. Zhang (ORCID: https://orcid.org/0009-0004-3855-7418)
- Ting Pan
- Haixia Zhang (ORCID: https://orcid.org/0000-0003-0832-6729)
- Yuewen Zhang (ORCID: https://orcid.org/0000-0003-1864-769X)
- Mei-Ling Sa (ORCID: https://orcid.org/0009-0004-7920-386X)
- Xiu-Jia Yang (ORCID: https://orcid.org/0009-0001-4272-511X)
- Yan‐Ping Shi (ORCID: https://orcid.org/0000-0001-6517-9556)
Institutions
- Lanzhou Institute of Chemical Physics (CN)
- University of Chinese Academy of Sciences (CN)
- Lanzhou University (CN)
Publication Details
- Journal
- Review of Scientific Instruments
- Published
- 2025-12-01
- DOI
- https://doi.org/10.1063/5.0293559
- Primary Topic
- Photoacoustic and Ultrasonic Imaging
- Type
- article
- Field-Weighted Citation Impact
- 0.00