Thermo 780nm (771nm) 50mW TEC Stabilized External Cavity Diode Laser System

Description

This auction is for a Thermo 780nm 50mW TEC Stabilized External Cavity Laser.
The Thermo ECDL is a temperature controlled external cavity diode laser.
These lasers were originally used in Thermo Raman Spectrometers.
They lasers are configured in the Littrow cavity configuration.
The grating used is a gold plated UV blazed at 1800 lines per mm.
The diode collimator is a Thorlabs C230TME-B.
The laser diode is temperature controlled with a small peltier ‘TEC’ element and 10K thermister.
Thermo part number: ‘780nm Laser Assembly’
The laser controller board allows for adjusting and monitoring of laser diode current and laser diode temperature.
I will supply the buyer with pinouts and more information.
The laser requires dual voltages of 12V and 5V to operate.
3 amps should be sufficient.
After power is applied, the leftmost led (CR1) will illuminate green.
This indicates the laser has been turned on and the Thermoelectric cooling system is active.
The middle led (CR2) turns on next.
Finally, once the TEC temperature has stabilized, the rightmost led (CR3) will illuminate, indicating power is being supplied to the laser diode.
The grating can be adjusted to shift the wavelength.
I measured the wavelength of this particular laser using an Ocean Optics USB4000 spectrometer and it is operating about 771nm.
It's possible to adjust the wavelength by tilting the position of the diffraction grating.
Output power has been measured at 50mW.
Output power can be adjusted via the LD set potentiometer.
I will provide this information.
Included in the assembly is a ½” diameter ½ waveplate in a rotating mount, used to adjust the polarization.
There is also Holographic notch filter and turning mirror on a small kinematic mount.
Please ask if you have any questions.
I have more of these available.
Thanks for looking.
Buyer to pay shipping.