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Laser distance measurement. Please help!

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luckyvn

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Hi all,
I'm a Vietnamese student. I've a project to make a laser phase type distance measurement sensor. In this forum some year ago had a topic about it. I don't know that friend got it or not. This project maybe a old project for you but it is a very new project in Vietnam. I have a few document so it very difficult. Please help me on this project. Thank you so much.
My idea is modulate a laser diode with frequency 2Mhz. After laser reflect from a target, it will collected by a photodiode. A phase comparator circuit will detects phase different from transmit light and receive light. Can you help me design a circuit to drive laser diode with 2 Mhz frequency. A circuit to detect phase different. My major is Physics so I have a lot problems with electronic. I hope will receive some documents or advices from you.
Thanks again.
This is the threat 2 years ago.
https://www.electro-tech-online.com/threads/laser-distance-meter.38490/
 
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