The case is the cathode ve of all three laser diodes as well as the monitor photodiode.
Blu ray laser diode driver.
Obtain an old dvd or blu ray writer.
This step up driver board works from 3 5v input and steps up the output voltage to suit 405nm blu ray laser diodes.
A blu ray writer has a blue diode with a wavelength of 405 nm.
This is a diy guide on how to make your high power burning blue ray laser.
I do offer a boost laser driver that is capable of driving this diode off a single li ion see my other offerings.
Now onto the first pic.
You are dealing with very high power lasers that will blind anyone in under half a secound if shined into your eyes or anyone elses eyes.
200mw 1100mw red green blue ir laser diode power driver circuit 5v w ttl parameters wavelength 200nm 1100nm working voltage 5vdc working current 250ma.
Look for a unit with a writing speed of 16x or faster.
These are connected in a ccc common cathode can configuration.
The isl58797 is a highly integrated single supply laser diode driver designed to support multi standard writable optical drives in cd dvd and blu ray formats at various speeds.
These units have diodes with a power output of 150 milliwatts mw or better.
All modules are tested and are in working condition prior to shipping.
It is a hybrid part having an interface compatible with a conventional ldd but an internal architecture similar to a write strategy ldd.
Drive current is set with a variable pot on the driver board.
How to make a high power burning blueray laser.
After you have removed the laser mount you need to scrap away the remaining glue and using a small jewelers screwdriver gently i mean gently tap around the edge of the diode housing to free it from the mount.
A dvd writer has a red diode with a wavelength of 650 nanometers nm.
The diodes are professionally extracted from replacement sleds for the bdr 209 blu ray disk burners so the pins will be a few mm shorter than a diode direct from.