Building a DPSS

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marcin
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Building a DPSS

Beitrag von marcin » Di 06 Mai, 2003 10:25 am

Hi everyone, again.
Seems like I am the only one putting out posts out here. Like I said I want to build a DPSS.
I wrote an email to this company called Lasever, anyone heard of them? And asked for a complete 30mW laser or a kit. These are the prices I recieved.
Complete
30mW DPSS 532nm--------450$
Kit (30mW)
-------------------
1.diode, $100
2.laser crystal, $35
3.SHG crystal, $35
4.OC lens, $20
5.power supply, $90
--------------------
I asked for the specifications, will recieve them shortly..
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Hatschi
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Re: Building a DPSS

Beitrag von Hatschi » Di 06 Mai, 2003 11:05 am

Halli Hallo

I hope, Tracky can write his costs here in
- ebay
- driver
- mechanics

His laser will have more output Power than 30mW.
Has the supply they offered you a TTL- or analog input for blanking?

Hatschi

Search in the "Laser-Selbstbau" forum fore DPSS.
Also read in the forum "Festkörperlaser".

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Re: Building a DPSS

Beitrag von marcin » Di 06 Mai, 2003 11:45 am

This is the powersuply they are offering
http://www.lasever.com/LSR-PS-II.htm
I found out that it is a 1W diode.
Question. Can I get more than just 30mW with this Power suply and 1W diode?
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Re: Building a DPSS

Beitrag von marcin » Di 06 Mai, 2003 1:57 pm

This is the specifications I got from the company regarding the crystals.
The size of KTP is 2x2x5mm.
The size of Nd:YVO4 is 3x3x1.
Nd:YVO4 is 3%
doped.
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Re: Building a DPSS

Beitrag von Hatschi » Mi 07 Mai, 2003 6:46 am

Halli Hallo

I don´t know this company. But it´s a realy interesting powersupply. Up to 2A and TEC! <img src="/images/graemlins/blush.gif" alt="" />
With my LaserDisk modul i get with 500mW about 70mW green. When they say, with 1W you can get 30mW maybe the crystals and coatings are not so good.
Ask Andi if he can offer you something, maybe a combined crystal-modul. He is the best for DPSS. <img src="/images/graemlins/wink.gif" alt="" />

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Mi 07 Mai, 2003 9:43 am

Hi Hatschi
So you say its a good deal huh?
Thats right, they say its a 1W module. Perhaps they dont really know what they are talking about? How much power do you say I could get out of this thing? When you say combined crystal, do you mean the hybrid or composite crystals like the CASIX DPM (DPM0101 and DPM0102)? I will talk to Andi. Either way, the powersupply seems like good deal right? Where did you get your crystals?
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Re: Building a DPSS

Beitrag von Hatschi » Mi 07 Mai, 2003 10:57 am

Halli Hallo

I will bye one supply for testing how it works. Be careful with the asians, only a view will have the quality like in europe. Sample: casix: they offer a red DPSS, but it´s a diodelaser!
Yes, with the combined I meaned something löike the casix.
1W for 100$ is very good, but perhaps it´s a c-mount (without case). Not good to use a c-mount for beginnig. Ask for the housing (9mm, TO3 ore else). Think: Andi offers the 1W 9mm for 260&#8364;? He can also get one for 100&#8364;, but the quality is too less.
I have my crystal from a pointer from hc-photonics.
You can use your offer for beginning, but its better to spend more money for better quality.
They say 30mW with 1W, I have 70mW with 500mW.

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Mi 07 Mai, 2003 12:08 pm

Hi Hatschi
I have sent an email to Lasever and asked them about the mount. Should recieve an asnwer today. So you want to buy that powersypply, good <img src="/images/graemlins/wink.gif" alt="" /> then I can use you as an experimental rabbit..hehe, just kidding. Let me know when you get it. I want to by this kit soon, I am very hungry for it.. The highest power I have owned is 16mW HeNe!
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Re: Building a DPSS

Beitrag von marcin » Mi 07 Mai, 2003 4:33 pm

This is the diode they are selling. The diode is C-mount in TO3 package. Why would this not be a good start?
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Re: Building a DPSS

Beitrag von Hatschi » Do 08 Mai, 2003 8:36 am

Halli Hallo

The problem with the c-mount is, that you hve to bild a case that is airseal. When there is getting dust or too much dampness on the chip, it will be demaged. The next weeks I will be on holyday so no way for me to try out the supply. I think you can´t get wrong if you take teh supply because 100$ with TEC-driver is very cheap.
How will you realize the machanical part? What is your business?
If you know how to use a solderin iron, you can make your own driver. It´s one from Andi and you can download it from Guidos homepage under downloads and then projekt Mot 1.

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Do 08 Mai, 2003 10:10 am

Hi there
I think I could build an airtight seal and cover for it, if that is the only thing that the mount is for or that the diode must have. If you have any ideas on how to build it you can tell me. I have started with the mechanical parts yesterday and I will put some pictures out today on my first laser homepage! I have just started it and and I will update it while I am learnign about this stuff. As I have understood the Nd-Nd:YVO4 must be as close to the KTP as possible right? But how far should the OC be from the diode? And how far should the crystals be from the OC? I will look at the driver plans. Have a great holliday!
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Re: Building a DPSS

Beitrag von Hatschi » Do 08 Mai, 2003 10:37 am

Halli Hallo

Andi has a ND:YVo4 where you don´t need a OC. Much more easy to calibrate! The KTP must stand in the right polarisation to the ND. And the OC must have a 2 way calibration. It must stand in a align with the ND!

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Do 08 Mai, 2003 11:46 am

Hi Hatschi!

I have looked at Andi´s ND:YVo4 that does not need a OC. I think I will still go for the offer I got from Lasever. My economy right now is not to exciting and I am also buying some hardware from Guido.
Can you tell me if there anythinhg else I need except for these parts that Lasever has offered me?
1, diode-1 watt 808nm laser diode, new
2, laser crystal-Nd:YVO4
3, SHG-KTP
4, OC-Plano-concave, coated
5, power supply LSR-PS-II -http://www.lasever.com/LSR-PS-II.htm

IR filter?
collimating lens?
diode driver?
A mount for the diode?
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Re: Building a DPSS

Beitrag von Hatschi » Fr 09 Mai, 2003 7:16 am

Halli Hallo

supply
LD
collimating lens
Nd:YVo4
KTP
OC
IR-Filter (better to use)
output optic

For last you need a TEC, about 20x20mm
You can stabilize:

LD + Nd:YVo4
LD + Nd:YVo4 + KTP

Don´t think that the LD is with "build in" TEC....

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Do 15 Mai, 2003 10:15 am

Hi There,
I have found a company here in stockholm which sells laser diodes and modules upp to 4W!. I have a meeting today to se how they work and get a good contact with them. I have asked them for broken DPSS laser modules and they have plenty, if I get lucky I can by some for a lower price. I dont know the price yet but if there will be enough of them, would any of you be interested? Perhaps we can get a good price if we by all of them? I will by as many as possible and put out some pictures soon.
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Re: Building a DPSS

Beitrag von tracky » Do 15 Mai, 2003 12:09 pm

Hi is a verry good thing. It's interesting. Please send more informations,okay!?
Gruß Sven

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Re: Building a DPSS

Beitrag von marcin » Do 15 Mai, 2003 3:01 pm

I have been to the meeting and I have positive and negative news. Negative- He only had two broken DPSS modules, I got them both for free (will use them to learn more about dpss and build my first one!!). I think there could be a way for him to collect broken modules from different places since he has alot of contacts. I had a good contact with him so I will stay in touch. Positive- He sells 808nm diodes and the prices for a 1W diode would be below 100 euro, thats what he told me, pretty good huh?. I will get a price list form him soon and put it out here. Today I will start the disection of the modules. <img src="/images/graemlins/smile.gif" alt="" />) Will put some pictures out when i am done.
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Re: Building a DPSS

Beitrag von marcin » Do 15 Mai, 2003 10:20 pm

Ok, I am almost finished dissecting the two modules. They were glued together and it took some time to do the job. One of the modules when I opened it did not have only had the KTP, I could not find the Nd-Yag. Could it be a composit??? Maybe I just lost it?? Here is the picture of the crystal it self: http://focus27.tripod.com/dpsslaser/ktp2.jpg
(sorry about the bad quality)
The other module is the one i am more familiar with. I cut it with a very thin saw and opened it to expose the KTP. I still have some work to do to take out the Nd-Yag. Here are some pictures.
http://focus27.tripod.com/dpsslaser/KTP.jpg
http://focus27.tripod.com/dpsslaser/module.jpg
http://focus27.tripod.com/dpsslaser/module2.jpg
In both modules the diodes do not work. But I have two KTP, one Nd-Yag, two collimating lenses, one OC I think, two IR lenses, and output optics!! I have not take all the optics out yet from the module.
http://focus27.tripod.com/dpsslaser/all.jpg
The links do not work for some reason, you have to copy and paste the adress
to be continued...
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Re: Building a DPSS

Beitrag von marcin » Sa 17 Mai, 2003 8:53 am

The links should work now. But you still have to copy and paste the adress!
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Re: Building a DPSS

Beitrag von marcin » Sa 17 Mai, 2003 6:22 pm

http://focus27.tripod.com/dpsslaser/ins ... dedpss.htm
The whole story of the DPSS surgery.
Copy and paste the adress if clicking does not work.
<img src="/images/graemlins/cool.gif" alt="" />Marcin
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Re: Building a DPSS

Beitrag von Hatschi » Mo 19 Mai, 2003 1:19 pm

Halli Hallo

The green one is the ND:YVo4
the transparent one is the KTP

Hatschi

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Re: Building a DPSS

Beitrag von tracky » Mo 19 Mai, 2003 1:23 pm

Hi Hatschi - U are back from france? Have you news about prices of cristals? I havn't become a answer from Andi. Can you help me?
Gruß Sven

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Re: Building a DPSS

Beitrag von marcin » Mo 19 Mai, 2003 2:01 pm

Hi Hatschi,
What do you mean? Have I given some wrong info??
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Re: Building a DPSS

Beitrag von ideasys » Mi 21 Mai, 2003 10:16 am

Halli Hallo

Ah, ok! Are the two moduls the same? Please tell me the position from the ktp2.jpg in the module.jpg. The green crystal in ktp2.jpg is deffinitly the ND:YVo4. Wich colour does it have on the other side? May you take some more pictures and sent it me with email (pleas less than 2Mb). I´m back from france on sunday to answer your email.

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Mi 21 Mai, 2003 11:05 am

Yes they are different.
http://focus27.tripod.com/dpsslaser/module.jpg
is different from
http://focus27.tripod.com/dpsslaser/ktp2.jpg

I think that http://focus27.tripod.com/dpsslaser/ktp2.jpg
is a composit crystal. When I opened the module I coud not find the Nd:YVO4, I only found that on the picture. I will take some more pictures of it. Also, I could not find an Output Coupler (OC) in the module. That meens that it could be a composit crystal yes??
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Re: Building a DPSS

Beitrag von Hatschi » Do 22 Mai, 2003 7:44 am

Halli Hallo

You don´t need a OC, if the KTP is coated HR1064 / AR532 on the output side.
If the crystals are combined or tey are seperate, it doesn´t matter. It´s all on, what the coatings are.

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Fr 23 Mai, 2003 11:31 am

Here are some pictures of the crystal I found in the other module. I could not find an Output Coupler (OC) in the module, and I could not find a Nd:YVO4. Could this be a comosit..??
http://focus27.tripod.com/dpsslaser/cry ... stal1.html
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Re: Building a DPSS

Beitrag von tracky » Fr 23 Mai, 2003 9:55 pm

It is a all in one crystal (Nd:YAG + KTP stuck together ) is not so good for high activity. The cooling is very difficult. 25-35 Degrese is okay.
Gruß Sven

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Re: Building a DPSS

Beitrag von marcin » Sa 24 Mai, 2003 9:55 pm

Tracky: Have you seen crystals like that before? Do you think I could get at least 100mW from it? Can you se from the pictures if it will need an OC?
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Re: Building a DPSS

Beitrag von marcin » Mi 28 Mai, 2003 11:49 pm

Ok, This is the powersypply I will by. TEC included! 90$!!! Can it get better than this?
http://www.lasever.com/LSR-PS-II.htm
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Re: Building a DPSS

Beitrag von scoborgll » Fr 30 Mai, 2003 12:38 pm

I cant find if the psu steering one or two tec. if it steers one its not so good because you need a tec driver for the crystals.

BUT for this money its ok!

Best regards
Harald
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Re: Building a DPSS

Beitrag von marcin » Mo 02 Jun, 2003 11:07 am

Hi Harald,

I will order that powersupply today. Even if it only has one TEC its pretty good for that money right? I have had some thoughts recently. Would it be possible to take a simple 5mW 650nm laser diode and replace the crystal with an 500mW 808nm crystal? I have done some surgery on a simple 1mW 650nm laserdiode. Here are some pictures. Its not the best quality, sorry about that.
http://focus27.tripod.com/dpsslaser/redld/red.html
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Hatschi
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Re: Building a DPSS

Beitrag von Hatschi » Mo 02 Jun, 2003 6:55 pm

Halli Hallo

There must be a mistake. There is no crystal in a red laser (pointer) with laserdiode.

Hatschi

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Re: Building a DPSS

Beitrag von marcin » Di 03 Jun, 2003 12:20 pm

Hi Hatschi,
Sorry about the misstake, lets try again.
I meant the microscopic chip like Indium/Gallium doped Arsenide. Would it be possible to replace that with a chip producing 808nm??
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Hatschi
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Re: Building a DPSS

Beitrag von Hatschi » Di 03 Jun, 2003 5:39 pm

Halli Hallo

No, not for homemade. For what do you want do do this?

Hatschi

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