SHF Communication Technologies AGWilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone ++49 30 / 772 05 10 • Fax ++49 30 / 753 10 78
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF 47211A
10 Gbps Optical DPSK
ReceiverDescription
Differential phase-shift keying (DPSK) is a well-known coding method which is of current interestin the transmission of high bit rate signals through optical fibers. Compared to the moreconventional amplitude-shift keying (ASK), DPSK offers higher sensitivity and enhanced
robustness against the impact of non-linear effects in DWDM transmission.
The SHF 47211A optical 10 Gbps DPSK receiver offers a solution for demodulation of DPSKencoded optical signals and conversion back into electrical signals for further analysis. It is a field
replaceable plug-in module which needs to be installed in a mainframe type SHF 10001A or SHF
10000A. Together with other plug-in modules from this instrument series, a modular and scalable
measurement system can be implemented. In conjunction with the 10 Gbps optical multi format
DPSK transmitter (SHF 46211A), optical DPSK transmission system studies can be performed
very efficiently.
The mainframe installed modules are controlled over a standard Ethernet connection by an
external computer. An easy to use software package provides not only a user friendly interface forchanging the operating parameters but also the capabilities of feature enhancement through futurefirmware & software upgrades.
To assist the customer in performing efficient measurements and to make the instrument robust
against variations of the wavelength of the input signal, a tracking mode is implemented. When
operating in this mode, the instrument automatically monitors the output signal and compensates
for any changes in the wavelength of the laser light. This feature is a powerful tool for long termmeasurements.

Features•••••••

Scalable and modular system
Windows Style Bert Control Center software package
Computer controlled operation over the Ethernet which also enables remote access.
Feature enhancement through firmware & software upgrades
User-specified bit rate (narrowband operation)
Decodes NRZ, RZ and CS-RZ DPSK signals
High sensitivity

Functional block diagramµC controlled
phase adjust

OpticalInput

SHF 47211A – V003 - 11/May/07DPSK MZInterferometer

BalancedDetector

SHF reserves the right to change specifications and design without noticeElectricalOutput

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Specifications – SHF 47211 AParameter

UnitMin.

Typ.

Max.

Conditions

Decoder
Optical Connector Type

FC/PC, other types
on request

Operating wavelength

nm

1520

1620

Optical input power intoreceiverdBm

Optical return loss

dB25

Decoder Excess opticalloss

dB

1.6

Data rate

Gb/s

Decoder phase tuningrange

FSR

2

Phase tuning response

second2

109.95

mean power

2.2
10.75

One fixed data rate
per decoder. Userto specify.

fiber heater
operation only

Balanced detector
Electro-optic bandwidthGHzDetector responsivity

0.5

Detector responsivity
matching%

Common-mode rejection

dBPDL

SHF 47211A – V003 - 11/May/07

20

broad band
operation0.6

at DC

101212Up to 20 GHz
20 to 50 GHz
0.4

0.8

SHF reserves the right to change specifications and design without notice

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Output signal
50 ΩConnector typeruggedized 1.85
mm (V-compatible)
male connector

Electrical output return loss

dB-10

Positive and negative pulse
amplitude matching%

20

Positive and negative pulse
delay matching

ps5

Output pulse amplitude

mV

Output pulse width(FWHM)
RZCS-RZ

ps

Output pulse zero crossing

mV0

Receiver sensitivity

dBmt.b.d.

200worst case

+10 dBm mean
optical input power

3367

Absolute maximum ratings
Optical input power intoreceiverdBm

13CWGeneral
Weightkg

Operating temperature

°C

1035

Storage temperature°C-2070

SHF 47211A – V003 - 11/May/07

2.5

SHF reserves the right to change specifications and design without notice

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