SHF Communication Technologies AG,
Amalienstrasse 14 • 12247 Berlin – Lankwitz, Phone ++49 30 / 772 05 10, Fax ++49 30 / 753 10 78,
E-Mail: mail@shf.biz, Web: http://www.shf.biz

Preliminary Datasheet
SHF 5003 NRZ
Optical TransmitterDescription
The SHF 5003 NRZ Optical Transmitter converts electrical signals into optical signals at a data
rate of up to 50 Gbps.
The main element of the SHF 5003 NRZ is a chirp-free Corning OTI X-cut Lithium Niobate MachZehnder modulator driven by an optimized SHF amplifier. The amplifier is specially tuned to matchthe characteristics of the modulator to ensure the best optical output signal.
The modulator exhibits very stable DC bias and an automatic bias circuit ensure high stability ofthe output signal. All features on the instrument can be controlled remotely via a GPIB connection.

Features
50 GBit/s TDM NRZ optical data streams<10 ps rise and fall time digital optical signals at 44 GBit/s
50 kHz to >40 GHz E/O conversion bandwidth (typical)
Quick optimization of optical eye diagram performance by user adjustable gain and modulator
bias control
GPIB connector for remote control
Modulator bias conditions controlled automatically
Selectable automatic and manual bias control (ABC circuit)

OptionBuilt-in 1550nm DFB peltier cooled laser with PM fiber loop to allow external laser to be
attached.

Functional Block Diagram

Laser Output

OP TICAL SPLITTER
MZ MODULATOR

Modulator Input
DC BiasGND

Opt-InRF -inPMF

PMF
Opt-out

SMF

Opt-out 99%

SMF

Data Output

Opt-InOpt-out 1%

Optional

Gain
10Vs
Bia

FRONTP ANEL
GNDIn

LASER

Data

Type SHF 810
Out

Optic-out

AMPuC Control

ABC InKey board
Display

SHF reserves the right to change specifications and design without notice - SHF 5003 NRZ – Rev. 1.11 – 20/AUG/2003 Page 2/4

SpecificationsParameter
Optical parameters
Wavelength range
Insertion loss

UnitExtinction ratio
Return loss
Chirp (Alpha parameter)
Positive slope
Negative slope

dBdB

Min.

dB

Typ.

Max.

C- and L-band
3.5

4

without optical connector

50
0.1
-0.1

Electrical and electro-optical parameters
Electro-optical bandwidth ofGHz
30
modulator
Bit rate
Gbps
50
Drive amplifier electrical return loss
dB-10
Drive amplifier input level
Vpp 0.35 (-5) 0.4 (-4) 0.45 (-3)(dBm)
Dynamic extinction ratio
dB1112ps

Position of crossing point%

Auto-bias control
Dither signal frequency
Dither signal amplitute (% of40Gb/s drive data signal)

kHz%

Absolute maximum ratings
Optical input power
Amplifier input power

dBmdBmGeneralWeightDimensions
Power supplykgmm
V

Power consumption
Operating temperature
Storage temperature
Electrical data input connector
Optical connectors (input andoutput)

W°C°C

connector to connector,
maximum transmission
without modulation

200.03-0.01

Dynamic signal to noise ratioOutput rise and fall times

Conditions

45149105055

small signal measurement
1method-3dB electricalmeasured between data
‘1’ and long sequence of‘0’ at 44 Gbps
20%…80% as displayedon oscilloscope

10120
410CWin operation
without power supply

9472x365x1109018015-20110
230
60

135
270

47…63 Hz

3585
V (1.85 mm) male
FC/PC (others availableon request)

1(F. Devaux, Y. Sorel and J.F. Kerdiles, "Simple Measurement of Fiber Dispersion and of Chirp Parameter of Intensity Modulated
Light Emitter", J. Lightwave Technol., vol. 11, no. 12, December 1993)

SHF reserves the right to change specifications and design without notice - SHF 5003 NRZ – Rev. 1.11 – 20/AUG/2003 Page 3/4

Internal laser specifications (optional)
Parameter
Wavelength parameters
CenterAdjustment
Resolution
Stability
Spectral widthSide mode suppression ratio

Unit
nm
nm
nm
nm
MHzdB

Min.

Typ.

Max.

Conditions

1550
0.01
0.05
0.005
30

0.5
45

2

over 24 hours-3dB

Output Waveforms
The signal source used in these measurements was an SHF BPG 44 E LJ operating at40 Gbps. Optical output signals from the SHF 5003 NRZ were detected with a high speed
photodetector and displayed on an Agilent 86100A oscilloscope with an 86118A 70 GHz plug-inand precision time base.
Input electrical waveform

Optical output waveformSHF reserves the right to change specifications and design without notice - SHF 5003 NRZ – Rev. 1.11 – 20/AUG/2003 Page 4/4