A high speed Lateral Electric Field Modulator (LEFM) and lock-in pixels amplifiers for stimulated Raman scattering (SRS)imager is presented. Since the generated signal from the SRS process is very small compared to the offset signal, a technique suitable for extracting and amplifying the SRS signal is needed. The offset can be canceled by tuning the phase delay between the demodulated pixel output signal and the sampling clock. The small SRS signal in large offset is amplified by the differential integration. The proposed technique has been investigated with an implementation of 64x8 pixels array using a pinned photodiode LEFM an lock-in pixels amplifiers. Very small signal can be extracted from large offset signal. A ratio of the detected small SRS to offset signal of less 10^-5 is achieved.

Date Published: 4 March 2014
PDF: 8 pages
Proc. SPIE 9022, Image Sensors and Imaging Systems 2014, 90220D (4 March 2014); doi: 10.1117/12.2042471

Published in SPIE Proceedings Vol. 9022:
Image Sensors and Imaging Systems 2014
Ralf Widenhorn; Antoine Dupret, Editor(s)