Good source for the DVD diodes?

**stanwax** · 03-05-2007, 13:15

Jim you said you were measuring 248mW outta that bare diode and I assume you use a laser check - what wavelength did you set on the LC?
I have measure the output of my open diode and have not got near what you have measured

I knew lasercheck gives odd readings when you select the wrong wavelength but what should we use?
I have traditionally used mine set to 658nm which is the most popular quoted wavelength for DVD though I have been studying data sheets tonight from various diode makers that vary from 650nm to 660nm - all for diodes with DVDRW as an application, like the manufacturers dont seem to know.

Lasercheck reads the following
LD with current of 150mA
650nm - 98.8mW
655nm - 88.9mW
658nm - 84.1mW
660nm - 76.7mW

Anyone suggest what the correct or most likely wavelength will be....?

Rob

**JimBo** · 03-05-2007, 13:19

I did mine at 658nm as that seemed the most common.

Jim

**stanwax** · 03-05-2007, 13:24

I may have answered my own question....
With the Lasercheck set to 650nm and the bare diode supported well enough to disperse the heat I measured 248mW at 300mA. or 218mW set to 658nm.
Rob

**p1t8ull** · 03-06-2007, 04:51

Has anyone tested the Opnext HL6545MG yet? They are rated as 130mW and spec'd at 120mW at 170mA, 660nm. Max current is spec'd at 210mA.

I tested my first one the other night and stopped ramping the current at 310mA when I was getting 236mW after the 13% loss optics - so thats about 267mW of raw output measured with the wand set to 660nm.

I need to test more to see if they can be pushed any harder, but at only £15 each they seem pretty good value to me.

Pit.

**marconi** · 03-06-2007, 05:44

Wow, Thats getting close to the diodes we use..
ours are spec'd to 250 at 345ma at 660

And , much cheaper too !!!

**chad** · 03-06-2007, 19:03

p1t8ul, great find!

The price doesn't seem too bad either. I am still looking for bigger and cheaper .

Chad

**Hemlock Mike** · 03-07-2007, 19:37

PitB --

I don't mind the price of about $24 USD for those diodes but shipping is $45

The power you are getting exceeds the curves a little - I really want to get a few.
Thanks for the input......

Mike

**p1t8ull** · 03-07-2007, 23:20

Originally Posted by Hemlock Mike

The power you are getting exceeds the curves a little

My recently aquired LC measured my other lasers that all came within expected spec, so I'm sure it's pretty accurate.
I'll be tesing some more from the batch today, and I'll post the results later.

Pit.

**JimBo** · 03-08-2007, 02:39

Where did you get them Pit?

Jim

**andy_con** · 03-08-2007, 03:29

so people are just ripping apart dvd burnings to ge thigh powered reds?

easy to do, just a lot of waste

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