Performance Edition

The Performance Edition uses a more powerful, ultra-narrow linewidth laser to achieve the best results. It is the recommended version for users that are serious about Raman spectroscopy. Check this page to compare the Performance Edition with the Starter Edition.

Although the Performance Edition is working, it is still considered a work in progress because it currently uses expensive lab drivers for TEC and LD control. We are currently putting all our best efforts to replace these drivers with much less expensive custom-made solutions to achieve a price below 3k€ for the complete unit (drivers included).

Warning: The Performance Edition uses a Class 3b laser. Always wear laser safety goggles when operating the laser. Laser safety training may be mandatory in your institution to handle Class 3b laser. Owning Class 3b lasers may also be illegal in your country. Always check local regulations before attempting to reproduce the experiments reported on this website.

The Performance Edition uses the same components as the Starter Edition except the laser block is replaced by the new #2020-18/0 laser assembly (see below). If you do not own a Starter Edition, order all the components necessary to build one but remove the parts CPS532, LDS5-EC, and #2020-05 that are not necessary for the Performance Edition. The total price should be 2530.26€ without the laser and TEC drivers.

Download the files here: Laser Assembly (rev0).

The link contains all the drawings, STEP files, and BOM to reproduce the laser assembly. We recommend POM for the LD clamp part (#2020-12) but we obtained good results with standard resin 3D printing for that part (do NOT use filament nor SLS).

Assemble the components as described here below:

Step 1/ Remove the front panel of the Thorlabs LDM21 and the sticky foam that is on the Peltier cooler. Degrease the Peltier using gentle acetone and cottons swabs. Let the acetone completely dry out before proceeding to the next steps.

Step 2/ Check that the LD switch is on “AG” (Anode Grounded) mode and install the DJ532-40 laser with the middle pin oriented top.

Warning: always use ESD mat when handling the laser diode. Failing to do so will damage your DJ532-40 permanently.

Step 3/ Install the o-ring in the groove of the #2020-12 (LD CLAMP) part. Set the clamp in place using two 2-56×1/2″ screws. If the screws are too long, use one or two washers. Do NOT overtighten the screws. The goal is to maintain the LD in contact with the TEC element without forcing on it.

Step 4/ Re-mount the front panel of the LDM21 and place the laser assembly on the Starter Edition base plate using two 8-32×3/8″ DIN912 screws.

Step 5/ Assemble the rest of the spectrometer according to the instructions of the Starter Edition.

To power the laser, you will also need LD and TEC drivers. We offer two different solutions for that:

Custom LD & TEC Driver

The custom LD & TEC Driver is the perfect alternative for those who want to keep the price to a minimum! The circuit can be reproduced under 500€ and offers no compromise to more expensive drivers!

Lab-Grade LD & TEC Driver

If you are not feeling confident in assembling the custom LD & TEC Drivers yourself or already own LD & TEC Drivers in your lab, this solution is for you!