Product Overview:
The Keysight N7786B polarization synthesizer consists of a lithium niobate based high-speed polarization controller and a polarization analyzer, as well as a microcontroller-based drive circuit.
As a polarization stabilizer, it provides a stable output polarization state (SOP) even if the input SOP fluctuates and drifts. The stable output signal is guided in a standard single-mode fiber (SMF). The output SOP can be defined in the following ways:
Once and for all: When the previous button is pressed, the current SOP is stored and maintained even if there is a polarization change on the instrument input.
Defined Stokes: The target output SOP can be defined by the user using the Stokes parameter
As a synchronous scrambler, the device switches the SOP of the output signal in a (pseudo-) random manner with cycle speeds up to 100 KSOPs/s.
The switching of SOP takes place within a few microseconds. Electrically triggered inputs can be used to synchronize a scramler with external events.
As an SOP switch, the Keysight N7786B cycles through a series of Sops at speeds in excess of 40KHz, which corresponds to a cycle time of less than 25 microseconds. Users can easily define the order of Sops using Stokes coefficients.
Features:
Comprehensive polarization stabilization/control/switching capabilities
No reset/unlimited operation
Covers the entire range from 1.3μm window to the L-band
Compact size
Applications:
Transmission system testing: Polarization sensitivity analysis of link/transmission quality
Loop experiment: loop synchronous polarization perturbation
Interferometry: Polarization stabilization to maximize contrast
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