Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2017 Oct 6;22(10):105001. doi: 10.1117/1.JBO.22.10.105001

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Authors.

Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

PMC Copyright notice

Fig. 1 — FDPM module and integrated probe containing a three-wavelength VCSEL package and 3-mm diameter circular APD. (a) The inside of the integrated probe consisting of a custom APD module with broadband transimpedance amplifier and high-voltage power supply. The VCSEL control module consists of digitally controllable switches and bias tees. (b) The probe face, which is placed in direct contact with tissue during operation. (c) The complete FDPM system, consisting the integrated probe, custom FDPM control module, and laptop computer for data collection and processing.