Douxleurre
- Aug 18, 2022
- 5
- Joined
- Aug 18, 2022
- Messages
- 5
Hello,
I work on a project in which I need to use powerful laser diodes in a lens pick-up unit of dvd graver. (I use wavelength-adapted safety glasses)
I have already made a power supply which worked fine for the following laser diodes (ordered alone) : ML101J29 & ML101U29-25 at around 110mA. Only, after around 60 seconds the irradiance decreases, as the diode heats up I suppose.
I did order 4 lens pick-up unit from Xbox 360 's dvd gravers (named HOP 141X). I was unable to find any datasheet for the red laser diodes in these lens pick-up unit and failed to make any of them work with my power supply unit.
I may have burned them all one by one by trying a wrong pinout however it seems unlikely to me as the powerful diodes with which I have first tested the power supply have seen many wrong pinout without significant damage.
Here is the schematic of my power supply, I believe a fixed-current source, with R1 = 8 Ohm (can be adjusted) and 9V as Vin (not 12V).

To pursue my project, I could replace the problematic laser diode in the lens pick-up unit by the laser diodes I bought separately and succeeded to supply power to, however, I expect heat evacuation issues. Before getting stuck I prefer to know if I did anything wrong.
To sum up, my questions are :
- I can't supply power to the red laser diodes in the HOP 141X lens pick-up units despite having a supply that should work on them. Does anyone has any tips/clues on this please?
- There are no fans in lens pick-up units, how is the heat generated by the laser diode evacuated? Only by conduction through lens pick-up unit?
Sincerely yours,
Douxleurre
Some details : the PCB on which the red laser diode is mounted has TS-2 written on it, and on the grey casing of the red laser diode can be found in black the inscription "1OTGO"
If that may help, here is how the HOP141X looks like and its red laser diode :



I work on a project in which I need to use powerful laser diodes in a lens pick-up unit of dvd graver. (I use wavelength-adapted safety glasses)
I have already made a power supply which worked fine for the following laser diodes (ordered alone) : ML101J29 & ML101U29-25 at around 110mA. Only, after around 60 seconds the irradiance decreases, as the diode heats up I suppose.
I did order 4 lens pick-up unit from Xbox 360 's dvd gravers (named HOP 141X). I was unable to find any datasheet for the red laser diodes in these lens pick-up unit and failed to make any of them work with my power supply unit.
I may have burned them all one by one by trying a wrong pinout however it seems unlikely to me as the powerful diodes with which I have first tested the power supply have seen many wrong pinout without significant damage.
Here is the schematic of my power supply, I believe a fixed-current source, with R1 = 8 Ohm (can be adjusted) and 9V as Vin (not 12V).

To pursue my project, I could replace the problematic laser diode in the lens pick-up unit by the laser diodes I bought separately and succeeded to supply power to, however, I expect heat evacuation issues. Before getting stuck I prefer to know if I did anything wrong.
To sum up, my questions are :
- I can't supply power to the red laser diodes in the HOP 141X lens pick-up units despite having a supply that should work on them. Does anyone has any tips/clues on this please?
- There are no fans in lens pick-up units, how is the heat generated by the laser diode evacuated? Only by conduction through lens pick-up unit?
Sincerely yours,
Douxleurre
Some details : the PCB on which the red laser diode is mounted has TS-2 written on it, and on the grey casing of the red laser diode can be found in black the inscription "1OTGO"
If that may help, here is how the HOP141X looks like and its red laser diode :


