Chapter 3 Description; Laser Head; Laser Power Supply - THORLABS HNL100R User Manual

Red HeNe Laser Systems
Chapter 3
Thorlabs' line of cylindrical, high-power, red (632.8 nm) helium-neon (HeNe) gas lasers have stable output
powers from 10.0 to 22.5 mW and a fundamental Gaussian beam. Depending on the model chosen, the output
beam will be either linearly polarized or randomly polarized (unpolarized). The state of polarization in a randomly
polarized laser beam is not truly an unpolarized source, but rather a single state of polarization that changes on a
small timescale.
3.1.

Laser Head

This laser head comes equipped with a manual shutter installed in the front bezel of the laser housing (see Figure
1 below). The front bezel has four 4-40 UNC holes to secure the optional accessory mounting ring and other
industry standard HeNe accessories. This laser also comes with a 6 ft long, high-voltage cable for connecting to
the power supply. This particular laser head is designed to operate at an optimum performance level when used
with the required Thorlabs power supply.
Manual Beam Shutter
4 M3 x 0.5 mm
Mounting Holes
Laser Aperture
3.2.

Laser Power Supply

The laser includes a power supply that is specially designed to be used with the HeNe laser and is CE-certified.
The power supply is enclosed in a protective housing and is CDRH compliant with a built-in 3 to 5 second time
delay, an Alden high-voltage connector (see Figure 2 below), a key lock switch with two removable keys, a power
on indicator , and a remote interlock connector. The power supply comes configured for one of three local mains
1
voltage: 120 VAC (no dash), 230 VAC (-EC), or 100 VAC (-JP).
1
The "Laser On" indicator will come on when the key is turned on. It does not indicate the laser is on, lasing, or the power supply is working. It
only indicates that there may be power going to the laser head.
Page 6
Description
Figure 1
Figure 2
Laser Head
High Voltage Alden Plug
Chapter 3: Description
22172-D02