SHF Communication Technologies AGWilhelm-von-Siemens-Str. 23 • Aufgang D • 12277 Berlin – Marienfelde • Germany
Phone ++49 30 / 772 05 10 • Fax ++49 30 / 753 10 78
E-Mail: sales@shf.biz • Web: http://www.shf.biz

Preliminary Datasheet
SHF 5008 DPSK
Optical 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 5008 DPSK offers a solution for the demodulation of DPSK-encoded optical signals andconversion back into signals for analysis. It is intended for use in conjunction with the SHF 5003
DPSK optical transmitter.

Features
Decodes NRZ, RZ and CS-RZ DPSK signals
High sensitivity
GPIB connector for remote control
All features computer controlled
User-specified bit rate (broadband operation is not possible)

SHF 5008 DPSK Receiver functional block diagram

SHF 5008 DPSK

Rev. 2.1 – 15/MAR/2004

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SHF reserves the right to change specifications and design without noticeSpecifications – SHF 5008 DPSKParameter
Decoder
Operating wavelength
Optical input power intoreceiver
Optical return loss
Optical isolation
Excess optical loss
Data rate

Decoder phase tuning
range
Decoder phase tuning
coefficient
Phase tuning response

Balanced detector
Electro-optic bandwidthDetector responsivity
Detector responsivity
matching
Common-mode rejection

Unit

Min.

nm
dBm

1520

dB
dB
dB
Gb/s

39.8

Conditions

mean power43

One fixed data rate
per decoder. User tospecify.

2mA2/GHz
second14fiber heater operation
only
fiber heater operation
only0.4

GHz
0.5%

450.610broad band operation
at DC

1212Up to 20 GHz
20 to 50 GHz
0.40.8dB%-1020ps3mV

200worst case

+10 dBm mean
optical input powerps

Output pulse width(FWHM)
RZ
CS-RZ
Output pulse zero crossing

mV

Receiver sensitivity

dBm

SHF 5008 DPSK

1620
10FSR

dBMax.

25
250.35PDL
Output signal
Electrical output return loss
Positive and negative pulse
amplitude matching
Positive and negative pulse
delay matching
Output pulse amplitudeTyp.

10150-34

Rev. 2.1 – 15/MAR/2004

SHF 5003 DPSK astransmitter. Seereferencemeasurement set up

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SHF reserves the right to change specifications and design without noticeAbsolute maximum ratings
Parameter
Optical input power into
receiverMaximum fiber heater
current for MZI decoder

Unit
dBm

Min.

Typ.

Max.
13mAConditions
CW

30General specifications
Parameter

Unitkgmm
V

WeightDimensions
Power supply
Power consumption
Operating temperature
Electrical data output
connector
Optical connectors

Typ.
990180W°CMax.

110230TBA

472x365x110
47…63 Hz1352701035

FC/PC
optical attenuator

RZ-DPSKtap coupler

optical amplifiers

Tx

Opt.out

15mW

Note

V (1.85mm)

Test Measurements
DFB Laser

Min.

OBPF

Clock in Data in

Clock

Opt. inPowermeter

Data

DPSK Receiver
Elec. out

40Gbps BPG
Clock

Data

Measurement
setup
Measurement
setup
40Gbps EA

1e-02

Bit error rate

1e-03
1e-04

Biterrorrate

1e-05
1e-06
1e-07
1e-08
1e-09
1e-11
1e-13
1e-15
-46-44-42-40-38-36-34-32

Optical power (dBm)

Two measurements made under different conditions. Magenta (left): 40 Gbps with a 70 GHz opticalbandpass filter and a preamp with 4dB noise figure. ~45 photons/bit Blue (right): 42.4 Gbps with a
1.2nm optical bandpass filter and a preamp with 5.5dB noise figure. ~71 photons/bit. Sensitivity limit:
20 photons/bit
SHF 5008 DPSK

Rev. 2.1 – 15/MAR/2004

Page 4/5

SHF reserves the right to change specifications and design without noticeEye diagrams

42.6 Gbps NRZ optical output signal. S/N: 11.3; RMS Jitter: 1.13 ps

42.6 Gbps RZ optical output signal. S/N: 13.2; RMS Jitter: 924 fs

42.6 Gbps CS-RZ optical output signal. S/N: 12.2; RMS Jitter: 1.19 ps

SHF 5008 DPSK

Rev. 2.1 – 15/MAR/2004

Page 5/5

SHF reserves the right to change specifications and design without notice