Фиксированный лазерный источник S3FC

These Fiber-Coupled Laser Sources feature a narrow linewidth DFB laser diode and a 40 dB optical isolator to eliminate back reflections and frequency jitter. The S3FC Series incorporates an integrated temperature control system for increased wavelength and power stability. The diode temperature and output power can be adjusted using the two front panel adjustment knobs, which ensures that the DFB laser diode can be tuned to match the laser cavity.
Also found on the front panel is a display that shows  the output power in mW or the temperature in °C, an on/off key, an enable button, and the FC/PC bulkhead connector (wide and narrow key compatible). The back panel includes an input that allows the laser diode drive current to be controlled via an external voltage source and a remote interlock input.

Features

• Available Wavelengths: 1310 nm and 1550 nm
• Single Mode, FC/PC Fiber Interface
• Narrow Spectral Linewidths: Typically <0.06 nm
• Thermoelectric Cooler (TEC) for Temperature Stabilization to within 0.005 °C
• Built-in 40 dB Optical Isolator
• Adjustable Temperature Setpoint
• Power Level is Adjustable via Knob and BNC Modulation Input
• Interlock Circuit Provided via 2.5 mm Mono Jack

Please refer to the table to the right for all of our single channel benchtop laser sources.

Single Channel Benchtop Laser Sources Selection Guide
Spectrum	Wavelength	TEC	Laser Type	Cavity Type	Output Fiber Type
Visible	405 - 675 nm	No	Semiconductor	Fabry Perot	SM, MM, or PM
	405 - 685 nm	Yes	Semiconductor	Fabry Perot	SM
NIR	785 - 1550 nm	No	Semiconductor	Fabry Perot	SM or PM
	705 - 2000 nm	Yes	Semiconductor	Fabry Perot	SM
	1310 - 1550 nm	Yes	Semiconductor	DFB	SM
	1900 - 2000 nm	N/A	Fiber Laser	Fabry Perot	SM
MIR	2.7 µm	N/A	Fiber Laser	Fabry Perot	SM
Other Fiber-Coupled Laser Sources

The plots above show the effect of changing the operating current of the laser while maintaining a fixed operating temperature (in this case 24.5 °C). The first plot corresponds to a drive current of 75%. Notice the broad line width, the laser is not optimized but the output will appear to be stable. The next plot is at 80%. The laser is approaching a stable point but the second mode indicates the laser is not yet stable. The laser will randomly mode hop, shifting the power from one peak to another resulting in erratic performance and power output. In the third plot, the current is at 85% and shows a typical optimized DFB output: a single, very narrow line width and very stable power. The last two plots, taken at 90% and 95%, show the laser passing through the optimum point and starting to ebb again.

The plots below show the relationship of temperature verse stability. With the drive current fixed at 85% of maximum, the operating temperature was increased by 0.1°C per plot, starting at 24.3 °C. In the first plot, the laser appears stable but it can be improved. As the temperature is increased to 24.4 °C the laser enters a transition point between modes. At this temperature, the laser may mode hop resulting in erratic output. At 24.5 °C the laser has reached a stable operating point, indicated by the single narrow line width. The last two plots (24.7 °C and 24.9 °C) show the laser passing through the optimum point and decreasing in stability and desired output.