Tunable Laser
Source
FLS-2800
FLS-2800 (v1.1)
4
2.
Introducing the FLS-2800 Tunable Laser Source
The
FLS-2800
Tunable Laser Source is a bench top single (or dual) channel Continuous Wave (CW)
laser system. With its high power output, narrow linewidth and the ability for high resolution tuning,
the
FLS-2800
is a low cost solution for various applications including coherent detection of high
speed complex modulation formats, DWDM component testing and optical sensor interrogation.
There are several variants of this instrument. Depending on your configuration, the FLS-2800 will
have C, L or both C and L-band lasers. The FLS-2800-1-2-CC-H-89 model for example (shown below)
is a dual-channel unit. The various models available are listed in
Table 1 - FLS-2800 Specifications.
Figure 3 - EXFO FLS-2800 Tunable Laser Source
Figure 4 - LCD Control Interface
The laser is calibrated at the time of manufacture and
controls its wavelength through the use of a look-up
table and a small, low-frequency wavelength dither.
As such, the displayed wavelength will be accurate to
better than 1 MHz at the start of life; after 25 years,
the calibration may drift by as much as 1.5 GHz.
Note that the 100 kHz maximum linewidth specification is an instantaneous measurement. In order
to guarantee frequency stability, a small FM dither (magnitude of 47 MHz at 888 Hz) is used to make
the laser appear to have a linewidth of 47 MHz if any integration time greater than 1 ms is used.
The FLS-2800 can be controlled via the LCD Control Interface as well as remotely through a TCP/IP
connection (Ethernet or USB). Both methods of control can act in parallel as required, although the
