S4FC Series Fiber Coupled Laser Source
Chapter 3: Description
Page 4
TTN051387-D02
Chapter 3
Description
The Thorlabs S4FC series of Fiber-Coupled Laser Sources provide an independent, high-precision, low-noise,
constant-current source with easy coupling and simple control of laser diode driven fiber optics. The S4FC series
laser sources are available in a number of standard wavelengths with single mode fiber standard.
The S4FC utilizes a microcontroller to fully control the laser’s optical power, temperature, and monitor the system
for fault conditions. The equipped thermo-electric cooler (TEC) stabilizes the Laser output wavelength and is
adjustable from 20 °C to 30 °C.
The front panel includes a 4-digit LED display which indicates the laser power or temperature set-point. Laser
power, which is calculated based on an internal photodiode monitor, and temperature are set by use of rotary
adjustment knobs located on the front panel. Tactile buttons allow for the selection of either laser power or
temperature to be displayed. LED’s indicate the selection of laser power or temperature. The laser output port is
located on the front panel.
The laser controller includes the ability to modulate the output via an external modulation input for analog
modulation. The USB connector on the back panel allows communication with a PC using a GUI or a command
line language (see section 5.9 on page 10). All S4FC series laser sources are equipped with a remote interlock
connector located on the rear panel. In order to enable the laser source, a short circuit must be applied across the
terminals of the remote interlock connector. A shorting pin is included and installed for use without an interlock
circuit.
The S4FC houses a switch mode AC-DC power supply that is compatible and compliant with all international line
voltages.
