20
Chapter 3. Operation
3.1
Laser and controller configuration
The
FSC
is compatible with a variety of lasers and controllers, provi-
ded they are correctly configured for the desired mode of operation.
When driving an
ECDL
(such as the
MOGL
abs
CEL
or
LDL
lasers), the
requirements for the laser and controller are as follows:
•
High-bandwidth modulation directly into the laser headboard.
•
High-voltage piezo control from an external control signal.
•
Feed-forward (“bias current”) generation for lasers that re-
quire a bias of
&
1 mA across their scan range
MOGL
abs laser controllers and headboards can be easily configured
to achieve the required behaviour, as explained below.
3.1.1
Headboard configuration
MOGL
abs lasers include an internal headboard that interfaces the
components with the controller. A headboard that includes fast cur-
rent modulation via an
SMA
connector is required for operation with
the
FSC
. The headboard should be connected directly to the
FSC
“
FAST OUT
”.
The
B1240
headboard is strongly recommended for maximum modu-
lation bandwidth, although the
B1040
is an acceptable substitute for
lasers that are incompatible with the
B1240
. The headboard has a
number of jumper switches which much be configured for
DC
coupled
and
buffered
(“
BUF
”) input, where applicable.
1
The FSC is capable of generating a bias current internally but the range is
limited by the headboard, and it may be necessary to use bias provided by the
laser controller.
Summary of Contents for FSC100
Page 1: ...Fast servo controller FSC100 Version 0 1 2 Rev 2 4 hardware ...
Page 4: ...ii Contents ...
Page 14: ...10 Chapter 1 Introduction ...
Page 22: ...18 Chapter 2 Connections and controls ...
Page 36: ...32 Appendix B 115 230 V conversion ...
Page 39: ......
