Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Recent content by brianpe

  1. brianpe

    Anyone here collecting parts for, or working on a DPSS project?

    Another update: some level of success. Little white dot on the white IR target is a 1064nm laser beam at about 2 watts: Glamor shot: The whole apparatus: Lots more to do. Only about 5% wall plug efficiency, need to convert to green, and need to convert to a z-fold so I can double-end...
  2. brianpe

    Anyone here collecting parts for, or working on a DPSS project?

    Progress Update: I spent a fair amount of time designing a TEC controller...and then designing another one that could handle higher currents because the 5A I was sending to the TEC wasn't enough to keep the FAP cool. Yes, it is a little concerning that it may take more power to cool the FAP...
  3. brianpe

    Anyone here collecting parts for, or working on a DPSS project?

    @Alaskan I'm wondering if you ever got the Spectra Physics ZLM to lase? I have a working TEC now so I can keep the FAP temperature in check and I'm trying to get the ZLM to lase but no luck. I'm only using one FAP -- do you or anyone else know the ZLM threshold? The output from the fiber...
  4. brianpe

    Anyone here collecting parts for, or working on a DPSS project?

    I'm starting to think the harmonic separator is the way to go. This is basically a mirror that only reflects 532 so you can keep the 532 in the KTP section of the resonator. This opens up your options a bit as every mirror in the resonator doesn't need to be both 1064 and 532. And yes...
  5. brianpe

    Anyone here collecting parts for, or working on a DPSS project?

    I am working on building one but it is very slow going. There's a lot I don't know...and the parts are quite expensive so I haven't run out and bought a ton of things to experiment with. I started with a Spectra Physics ZLM I bought off eBay with the idea of converting it to 532. But I soon...
  6. brianpe

    Converting Spectra Physics ZLM Laser Head to 532NM (Part 1, ruined my FAP edition)

    A new FAP just arrived and I was careful to find one with the original SMA to SMA coupler on it . I also purchased official Coherent fibers so I can compare the differences. The fibers do look to be standard SMA905 -- same ferrule length. Although they look like they have an AR coating on the...
  7. brianpe

    Converting Spectra Physics ZLM Laser Head to 532NM (Part 1, ruined my FAP edition)

    The fiber ends were clean. I took Encap's advice and talked to both Thor Labs and Coherent. The problem is that Coherent's SMA connectors go in deeper than standard SMA 905, so there was too much air gap.
  8. brianpe

    Converting Spectra Physics ZLM Laser Head to 532NM (Part 1, ruined my FAP edition)

    First, the good news: I successfully designed a dual constant current power supply to drive two FAP800s for this laser head. It is small and can run off a LiPo RC car battery. It can deliver 50A to each FAP and can be controlled by a microprocessor: I was able to easily take the two FAP800's...
  9. Fiber Coupling

    Fiber Coupling

    A close up of the fiber connection to the FAP800s.
  10. Burned Fiber

    Burned Fiber

    I ruined this fiber when I turned the power up.
  11. Spectra Physics ZLM Laser Head Conversion

    Spectra Physics ZLM Laser Head Conversion

    Ongoing photos of my attempt to convert a Spectra Physics ZLM laser head to 532nm.
  12. Power Supply

    Power Supply

    Home-designed constant current switching supply. Two channels each capable of up to 50A and microprocessor control.
  13. brianpe

    My New LPM Design

    Do I have to admit that? The Ophir sensor was $277 and the most expensive single part. Electronic components were about $150 with $60 of that just the display. Then there was PCB fabrication (~$50), 3D printing ($40) and, I'm a little ashamed to say, the grey front panel was a custom graphic...
  14. brianpe

    My New LPM Design

    Happy to leave that market to J Bauer. It would drive me nuts if I *had* to make these.
  15. brianpe

    My New LPM Design

    Several years ago I built an LPM based on an Ophir head, voltmeter, and DC-DC converter (original post). Since that time I've found the need for something new: Powers are getting higher, and my Ophir head maxes out at about 10 watts. Need a new head for dual-diode designs. Really large case...




Top