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Entry  Wed Jul 10 17:54:58 2013, Chloe, DailyProgress, ECDL, Solidworks Design base.SLDPRTdiode_mount.SLDPRTgrating_mount.SLDPRTlid.SLDPRTsketch_with_lid.PNG
    Reply  Thu Jul 11 17:51:12 2013, Chloe, DailyProgress, ECDL, Solidworks Design lid.PNGsketch_without_lid.PNG
       Reply  Fri Jul 12 15:25:56 2013, Chloe, DailyProgress, ECDL, Solidworks Design 
          Reply  Thu Jul 18 16:34:22 2013, Chloe, DailyProgress, ECDL, Solidworks Design 
             Reply  Mon Jul 22 18:30:20 2013, Chloe, DailyProgress, ECDL, Solidworks Design final_3d.PNGfinal_top.PNG
                Reply  Tue Jul 23 17:59:47 2013, Chloe, DailyProgress, ECDL, Solidworks Design 
Message ID: 1246     Entry time: Mon Jul 22 18:30:20 2013     In reply to: 1244     Reply to this: 1253
Author: Chloe 
Type: DailyProgress 
Category: ECDL 
Subject: Solidworks Design 

Tara and I received the parts we ordered from Thorlabs. I will be working in the ATF lab on the corner of one of the optical tables. Tara showed me around a little; we will likely work there more tomorrow. 

I met with Tara and discussed the final mechanical design. In particular, 

  • Tara explained a way to design a mount to attach the window onto the wall of the box, and I built the mount. Although my design has the mount on the inside of the box, it is symmetric so it can go on the outside just as easily if we find that easier. 

  • We decided to have space for a 9 pin D-sub connector and 2 BNC cables (one for the current driver, one for the PZT) on our box. 

  • We decided to not make a collimator mount yet, since the focal length of the collimating lens will depend on the beam characteristics of the laser, which we will not know until we experiment with this. There aren't currently holes on the base plate for the collimator mount to screw in; we will add this later once things are more certain. 

  • For the PZT, we need to figure out how to make the grating angle/length adjustable. This can be accomplished with a screw and PZT element (based on what I've seen online, probably about 2 mm thick). We aren't sure whether the machine shop is able to make thread fine enough to put the screw directly on the grating mount (~80/inch), so Tara is emailing them to find out if they can. We can create a separate mount for a micrometer screw otherwise. This is the PZT I would like to order: http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=100800 

  • The Mroziewicz paper discusses how to determine the ideal pivot point for a grating mount of an ECDL. I looked into this, and calculated that for a cavity of about 10 cm at 1064 nm (an angle of 39.7 degrees), we want the pivot point to be about 12 cm away from the center of the grating, so I modified the design slightly to accommodate for this. 

  • I'm adding an extra hole on the base so that if we decide to use a mirror mount with an adapter instead of the grating mount (in case the diode doesn't emit light straight in one direction). Everything is also at an appropriate height so if we decide we need to use a mirror mount, the rest of the design should still function. 

The changes have been implemented in Solidworks. The finalized pieces I want to have machined are on the 40m SVN in the ECDL folder. I've also attached a couple of pictures for a quick overview. 

Since we are trying to find a good enough current driver to use, Tara thinks I can start by configuring the TEC on a piece of copper to make sure it works. I will try to do this tomorrow now that the design is ready to be sent into the machine shop. I will also figure out a good time to go over to the machine shop and discuss the design with them. 

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