RED Module Kits for the ML520G71 Diodes

[logsquared]

For the last few months I have been experimenting with the Mitsubishi ML520G71 diodes. I believe they are a great value in price for the wavelength and power they produce. Because of the wide stripe and bad astigmatism they have some special requirements to get a usable beam. These kits are made to address those problems. In particular, a telescope to correct for the large fast axis divergence and a diode mount that allows X/Y and rotational adjustment of the diode. The base plate has several threaded hole positions for the telescopes objective lens. This allows the use of different focal length objectives. The kit also contains adjustable mounts for the telescope lenses allowing for critical height, rotation and focus adjustments. To bring the two beams together a PBS cube is used (not included) with a 1/2 waveplate (included) to rotate the polarization. The cube is on a slotted mount to allow coarse positioning. The waveplate mount has a few degrees of rotation to peak the power through the cube. A special designed X/Y flex mirror mount with dielectric mirror (included) allows, not only coarse adjustment, but also fine adjustment to overlap the far field spots. The overall dimensions are 6.5 X 2 X 2 inches.

Additional components needed to make the unit complete:
(2) 4mm FL collimation lenses 405-g-1 in M9 X .5 barrels (currently waiting to test optima precision lenses)
(1) PBS cube red or broadband
(2) Diodes
(1) diode driver with power supply
(1) AR window .75" diameter. (optional)

These module kits are hand made. So, small modifications can be made at the buyers request. Possibilities include: Milling a pocket on the underside of the base for TEC. Adding a 4-40 hole inside the module for mounting a flexmod or other driver. Other telescope options are also a possibility. The beam parameters can be adjusted to match other modules you may use.

Beam specs as listed: < 5 X 5mm at aperture. Divergence of ~.1.2 X .9 mRad. (For reference: approx. half of an uncorrected 445 with olike collimator). 800mW at .5 amps minus loses from your cube.

The price as described is $280USD

[steve-o]

Ohhh, Nice LS! Gotz to get some funds together .. I wonder if you pushed the diodes to 600-700 ma (w/ tec) if you could get 1 Watt out of this bad-boy? Or would that screw up the nice beam profile/ divergence..
Where to get 405G1 lenses in barrel?
Nice job! Do you make these up one at a time or do you already have a few built and reddy-to-go?
Lookin' mgood !

[logsquared]

Thanks! Well over 1 watt should be possible at 700mA. The TEC should only be needed for use in high ambient conditions (currently the topic of discussion in the ML520G71 thread)

Jayrob on LPF sells the 405g1's in barrels. Not cheap, but good quality. They may fit in in Dave's barrels as well.

I am working on finishing 5 units by Wednesday of which one is sold.

[LaNeK779]

dave has lens barrels for both the 405-g-2 and the optima lens, check with him steve

the optima and the 405 are slightly different, so they have diferent lens barrels

[logsquared]

Thanks for the clarification. You can't go wrong with Dave's products. I haven't personally used his lens barrels but everything else I have got from him was top notch. Plus he is a super cool guy.

Update: I have spoken to a supplier and should eventually be able to include lenses. This could take some time to iron out. So, I would suggest Dave's barrels and the 405-g-1 for the time being.

dave has lens barrels for both the 405-g-2 and the optima lens, check with him steve

the optima and the 405 are slightly different, so they have diferent lens barrels

[steve-o]

(currently waiting to test optima precision lenses)

Should we wait to see the results of these?
(I have to wait anyway due to the lack of monitary solidity at the moment at least until after C'mas .. :/
..Am looking forward to 1 Watt of purdy bright red tho!!!!!!!!!!!!!! Yee-Hah!!

[logsquared]

Should we wait to see the results of these?
(I have to wait anyway due to the lack of monitary solidity at the moment at least until after C'mas .. :/
..Am looking forward to 1 Watt of purdy bright red tho!!!!!!!!!!!!!! Yee-Hah!!

I can't get in touch with Optima. I decided to give up on them. I have found another supplier. Unfortunately the minimum order is higher The new lenses I am waiting on should be identical to the 405-g-1. Even if the collimator is slightly different it won't change the mechanical design. Possibly the focal length of the objective lens, that's it.

[LaNeK779]

there are two options, either we wait for your cyls to reach me and i'll test them with the optima, 405 and dave lenses i have, or i send a couple of optima lenses over to you for your own tests

i suggest you wait for the cyls to reach me, as most probably, we will ditch the optima and settle for shorter FL lenses, at least that's my feeling

[logsquared]

What Fl are your optimas?

there are two options, either we wait for your cyls to reach me and i'll test them with the optima, 405 and dave lenses i have, or i send a couple of optima lenses over to you for your own tests

i suggest you wait for the cyls to reach me, as most probably, we will ditch the optima and settle for shorter FL lenses, at least that's my feeling

[logsquared]

Here is a module I built for a member. They opted to leave of the lid and have a flexmod installed on the back.