N7786B Datasheet, PDF (1/4 Pages) Agilent(Hewlett-Packard) – Polarization Synthesizer

Agilent N7786B
Polarization
Synthesizer
Data Sheet
SOP switching occurs within a few microseconds. An
electrical trigger input can be used to synchronize the
scrambler with external events.
Figure 1. N7786B Bench-top Instrument
Introduction
As an SOP switch, the N7786B cycles through a
sequence of SOPs with a speed of more than 40 KHz,
which corresponds to a cycle time of less than 25
microseconds. The sequence of SOPs can easily be
defined by the user using Stokes coefficients.
As a traditional scrambler, the N7786B varies the
output SOP in a random way.
The Agilent N7786B contains a high-speed Lithium-
Niobate based polarization controller and a polarization
analyzer plus a microcontroller-based driving circuitry.
This unit can operate in various modes:
As a polarization stabilizer, it provides a stable output
state of polarization (SOP) even with fluctuations and
drifts of the input SOP. The stabilized output signal is
guided in a standard single-mode fiber (SMF). The out-
put SOP can be defined in the following ways:
Full coverage of the Poincaré Sphere is achieved within
a few ms.
As a polarization analyzer, the instrument provides
truly high-speed capabilities: More than 500K samples
can be taken with a sample rate of up to 1 Megasample
per second.
The unit does not contain any moving parts, and
therefore is robust and withstands even rough
environmental conditions.
● Set-and-forget: When the front button is pushed,
the current SOP is stored and maintained, even if
polarization changes occur on the instrument input.
● Defined stokes: The target output SOP can be
defined by the user using the Stokes parameters.
● As a synchronous scrambler, the device switches
the SOP of the output signal in a random (pseudo)
way with a cycling speed of up to 100 KSOPs/s.
All above-mentioned applications of the N7786B are
supported by Agilent PC software that comes with this
instrument.
Various instrument drivers and connectivity to external
applications are provided through a DLL interface.
Examples are included.