Specifications

ES10 Page 82/100
Document status: Released Operating Manual rev. 07, 25.09.13
6.5.8 Changing Optical Output Power Mode
There are 3 different output power modes available for the ES10 as shown in the figure below:
Fig. 6.5.9: Setting the optical output power mode of ES10
1. OFF / Standby. By selecting this mode the ES10 will operate with optical output power
switched off. However, the laser temperature is still kept at the operating temperature by
driving the peltier cooler enabling a fast switching-on time. Additionally the RF input
monitor is operating. Note: In future software releases it is intended not to completely
switch off the optical power but to decrease the optical power below a certain threshold
(e.g. –3 dBm) in order to enable the supervision of the laser in standby mode and in order
to enable the supervision of the fiber link between the ES10 and the subsequent EDFA or
RX.
2. ON. The transmitter output power is always on (default = factory setting).
3. ON / Standby on alarm. The transmitter output power is on, as long as there is no internal
alarm. In case that an alarm condition occurs, the output power is switched into standby
mode. This operating mode has been designed especially for redundant transmitter
operation: If e.g. an RF input alarm occurs, the optical output power is switched to standby
mode. This consequently should also disable the subsequent EDFA. If a pair of two ES10
with subsequent EDFA are intended to be used for redundant operation (master/slave