====== 405nm Laser Diode ======
Blue, Violet, almost Ultraviolet really. I made a driver board and just need to finish the heatsink and mount it in a case. I bought a translucent blue project box from Hammond that I'll be mounting the laser in.

  * 405nm (Blue) Laser
  * 3 pin
  * 3.6mm diameter

===== Power Measurements =====
{{ :projects:405nmlaser:p1020989.jpg?400|}}
^Current (mA)^Voltage (V)^Power (mW)^
|30.0|4.10| |
|40.0|4.26|0.83|
|43.0| |2.2|
|45.0| |2.4|
|46.0| |2.9|
|47.0| |3.7|
|48.0| |4.1|
|49.0| |4.4|
|50.0|4.41|5.7|
|60.0|4.52|9.8|

===== Pinout =====
{{:projects:405nmlaser:ldpinout.gif?100|}}
^Pin^Description^
|1|Anode(+)|
|2|Case Ground|
|3|Cathode (-)|
|4|nc|

===== Diode Driver =====
{{:projects:405nmlaser:ld-schem.png|}}

{{ :projects:405nmlaser:ld-pcb.png|}}
^Component^Digikey Part#^Description^Price^
|IC1|LM317|LM317|$|
|R1|CT6EP500-ND|POT 50 OHM 6MM CERMET TOP|$0.73|
|D1,D2|MBRA140T3GOSCT-ND|DIODE SCHOTTKY 40V 1A SMA|$|

Based on schematic from [[http://www.repairfaq.org/sam/Blu-ray/site1/diode.html]]

===== Collimating Lens =====
Currently I am using a plastic collimating lens intended for a red laser diode.

I need to get a quote on a proper lens such as this one from Lightpath, [[http://www.lightpath.com/literature/catalog/LightPath_Catalog_Blue_Laser.pdf|352673-A or 352671-A]]

Both [[http://www.edmundoptics.com/|Edmund]] and [[http://www.thorlabs.com/thorProduct.cfm?partNumber=352671-A|Thorlabs]] carry as well as Newport.

====== Pictures ======
**Click to enlarge, Mouseover for description**

{{:projects:405nmlaser:p1020989.jpg?200|Diode connected to driver board}}
{{:projects:405nmlaser:img_0720.jpg?200|Violet diode}}
{{:projects:405nmlaser:img_0721.jpg?200|Violet diode}}
{{:projects:405nmlaser:img_0730.jpg?200|Violet diode}}
{{:projects:405nmlaser:img_0735.jpg?200|Red/UV? diode from DVD}}
{{:projects:405nmlaser:p1020954.jpg?200|Green fluorescing marble}}
{{:projects:405nmlaser:p1020955.jpg?200|UV Laser on paper}}
{{:projects:405nmlaser:p1020985.jpg?200|Copper heatsink}}
{{:projects:405nmlaser:405nm_60ma_cropped.jpg?200|Lasing at 60mA}}
{{:projects:405nmlaser:p1020543_cropped.jpg?200|Same setup, just with lights on}}
{{:projects:405nmlaser:img_0714.jpg?200|Datamatrix barcode on back of Violet diode}}
{{:projects:405nmlaser:405nm_laser.jpg?200|405nm diode freshly removed from DVD player}}
{{:projects:405nmlaser:p1020986.jpg?200|Driver board}}

===== Pictures of a red laser diode and driver =====
You can see the photodiode in the back of the can. The Violet LD dosen't have a photodiode.

{{:projects:405nmlaser:img_0741.jpg?200|Red Diode driver front}}
{{:projects:405nmlaser:img_0742.jpg?200|Red Diode driver front}}
{{:projects:405nmlaser:img_0746.jpg?200|Red Diode}}
{{:projects:405nmlaser:img_0747.jpg?200|Red Diode}}

====== 4 pin Laser Diode ======
{{:projects:405nmlaser:ir_visible_laser.jpg?200|}}
  * 650nm (Red) Laser
  * 760nm (IR) Laser
3.6mm diameter

====== Optics ======
{{:projects:405nmlaser:optics.jpg?300|}}
  * Dichroic mirror
  * Beam splitter
====== Hardware ======

HD DVD player which was disassembled.

Toshiba HD DVD Player

Model HD-A2KU

{{:projects:hddvd.jpg?200|}}

====== Newport Laser diode driver notes ======
Require a DB9 Male
^Pin # ^Description ^
|1,2 |Interlock Shorting jumper or external closure |
|3 |Chassis Gnd AC coupled to chassis shield or drain wire |
|4,5 |Laser Cathode |
|6 |Photodiode Cathode |
|7 |Photodiode Anode |
|8,9 |Laser Anode |


====== Useful Links ======
  * [[http://repairfaq.cis.upenn.edu/sam/laserdio.htm#diodct2|Determining the Laser Diode Pinout]]
  * [[http://repairfaq.cis.upenn.edu/sam/laserdps.htm|Diode Laser Power Supplies]]
  * [[http://www.semicon.toshiba.co.jp/docs/catalog/en/BCE0026_catalog.pdf|Toshiba Laser Diode Product Catalog]] - Should be very useful - {{:projects:405nmlaser:bce0026_catalog.pdf|Local Copy}}
  * [[http://www7.toshiba.com/secured/tass/technical/dvd/HDA2_SVM.PDF|Toshiba HDA2 Service Manual]] - Not as useful as you might think. Should be useful for scavenging other parts off of the board, especially the display and the TOSLINK connector.
  * Blu-Ray
    * [[http://www.repairfaq.org/sam/Blu-ray/site1/diode.html|Dissection of a Blu-ray Reader Assembly]] - Different than what I encountered
    * [[http://www.electricstuff.co.uk/violaser.html]]
    * [[http://www.fineartradiography.com/hobbies/lasers/blu-ray/index.html]]
    * [[http://www.repairfaq.org/sam/Blu-ray/site1/optics.html]]
    * http://www.k3pgp.org/laserbias.htm