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N7785C Synchronous Scrambler and Polarization Stabilizer
The Keysight Technologies N7785C is a high-speed synchronous scrambler that can repeatably switch through a series of states of polarization (SOP) with both input and output triggering functions.
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Highlights
- Comprehensive polarization control and management capabilities
- Wavelength options to cover entire CWDM wavelength range
- <10 µs SOP cycling time
- Robust, no moving optical parts
The Keysight Technologies N7785C is a high-speed synchronous scrambler that can repeatably switch through a series of states of polarization (SOP) with both input and output triggering functions. This unit can operate in various modes:
- As a synchronous scrambler, the device switches the SOP of the output signal in a (pseudo) random but repeatable pattern. Switching of the SOP occurs within a few microseconds. The SOP is stable for a predefined time until it again switches to a new SOP. An electrical trigger input can be used to synchronize the scrambler with external events.
- As an SOP switch, the N7785C allows switching the internal waveplates to user definable angles with very high speed and repeatability.
- As a traditional scrambler, the Keysight N7785C varies the output SOP smoothly in a random walk pattern.
- As a polarization stabilizer, the Keysight N7785C uses feedback via program commands to set and stabilize the SOP base on an external reference.
Programming uses a new SCPI command set and the instrument is addressed as a VISA resource. The instrument comes in a compact form factor of just one rack height unit, with LAN and USB interfaces.
Key Specifications
Applications
Loop-synchronous scrambling
Transmission system test
Component characterization
SOP switch
Polarization stabilizer
Input Power Range
< +20 dBm
Insertion Loss Choice
<4.5 dB at 1270 - 1375 nm
<4.0 dB at 1375 - 1460 nm
<4.0 dB at 1490 - 1620 nm
PDL
< 0.18 dB typical at 1550 nm
SOP Cycling Time
< 10 µs
Type
Optical Polarization Solution
Applications
Input Power Range
Insertion Loss Choice
PDL
SOP Cycling Time
Type
Loop-synchronous scrambling
Transmission system test
Component characterization
SOP switch
Polarization stabilizer
< +20 dBm
<4.5 dB at 1270 - 1375 nm
<4.0 dB at 1375 - 1460 nm
<4.0 dB at 1490 - 1620 nm
< 0.18 dB typical at 1550 nm
< 10 µs
Optical Polarization Solution
View More
Applications:
Loop-synchronous scrambling
Transmission system test
Component characterization
SOP switch
Polarization stabilizer
Input Power Range:
< +20 dBm
Insertion Loss Choice:
<4.5 dB at 1270 - 1375 nm
<4.0 dB at 1375 - 1460 nm
<4.0 dB at 1490 - 1620 nm
PDL:
< 0.18 dB typical at 1550 nm
SOP Cycling Time:
< 10 µs
Type:
Optical Polarization Solution
Wavelength Range:
1240 nm to 1650 nm
1480 nm to 1620 nm
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