SHF Communication Technologies AG,Wilhelm-von-Siemens-Str. 23 D • 12277 Berlin–Marienfelde • Germany
Phone ++49 30 / 772 05 10 • Fax ++49 30 / 753 10 78
E-Mail: mail@shf.de • Web: http://www.shf.deDatasheet
SHF 46212ADuobinary TransmitterSHF 46212 A – V001 – 23/Oct/2006

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SHF reserves the right to change specifications and design without noticeDescription
The SHF 46212 A is an optical duobinary transmitter unit, in the style of a half-width plug-in for theSHF 10000 A mainframe. Field installation or upgrade by the end-user is possible for thisequipment.
The SHF 46212 A Optical Transmitter converts an NRZ electrical signal into an optical duobinarysignal at a data rate of 40 - 44 Gbps.
The main elements of the SHF 46212 A is a chirp-free Lithium Niobate Mach-Zehnder modulator
driven by an optimised duobinary driver amplifier.
The duobinary amplifier generates an electrical 3-level signal, driving the LiNbO3-modulator
at 2 x Vπ.
An automatic modulator DC bias control loop ensures high stability of the optical output signal.

Features••••••

40 – 44 Gbps optical data streams
Quick optimization of optical eye diagram performance by user adjustable gain and modulator
bias control
Modulators’ bias condition controlled automatically
Selectable automatic or manual bias control (ABC circuit)
SONET/SDH compatible
All features controlled using custom software (BCC) via Standard Ethernet

Functional block diagram

SHF 46212 A – V001 – 23/Oct/2006

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SHF reserves the right to change specifications and design without noticeSpecifications – SHF 46210 B
Parameter

Unit

Min.

Typ.

Max.

Comment

Optical parameters
Wavelength range

C- and L-band

Insertion lossdB6

DC Extinction ratio

dB20

Return loss

dB30

Chirp (Alpha parameter)
Positive slope
Negative slope

8connector to connector,
maximum transmission
without modulation

without optical connector

0.2-0.2

small signal measurement
1method

Electrical and electro-optical parameters
Electro-optical bandwidth ofmodulator

GHz

Electrical bandwidth of drive
amplifierGHz

Drive amplifier electrical return loss

dB

Drive amplifier input level

Dynamic extinction ratio@ 40 Gbps

15-10Vpp(dBm) 0.32 (-6)
dB

Dynamic signal to noise ratio@ 40 Gbps
Output timing jitter <RMS>@ 40 Gbps-3dB electrical

250.45 (-3)

10111011ps1kHz

10measured between data
‘1’ and long sequence of
‘0’

1.3

Measured with SHF
Pattern Generator with low
jitter output option,
precision timebase DCA.
De-embedded from 40
Gb/s NRZ electrical data
sourceAuto-bias control (ABC)
Dither signal frequency
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 46212 A – V001 – 23/Oct/2006Page 3/6

SHF reserves the right to change specifications and design without noticeAbsolute maximum ratings
Parameter

Unit

Min.

Typ.

Max.

Optical input power

dBm

17

Data amplifier input power

dBm

10Conditions
NRZ data

General specifications
Parameter

Unit

Min.

Typ.

Weightkg

3.3

Dimensions

mm

59x213x450

Power consumption

W

20

Operating temperature°C

Electrical data input connector
Optical connectors

SHF 46212 A – V001 – 23/Oct/2006

10Max.

Conditions
w/o Frontpanel Connectors

35
V (1.85mm)
FC/PC

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SHF reserves the right to change specifications and design without noticeTest Measurements
The following equipment was used in obtaining these results:
SHF12100 B S/N 6022 Pattern Generator
SHF 1550DFB Laser source set to 15mW output power @ 1550 nm.
AMPAQ EDFA + 1nm bandpass filter
Agilent 86100A DCA with 70GHz plugin and precision timebase module
Typical transmitter data input signal

43 Gbps electrical signal. S/N: 15.9; RMS Jitter: 522 fs
Transmitter data output signal

43 Gbps optical output signal. S/N: 13; RMS Jitter: 940 fs

SHF 46212 A – V001 – 23/Oct/2006

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SHF reserves the right to change specifications and design without noticeChange note:

newSHF 46212 A – V001 – 23/Oct/2006

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SHF reserves the right to change specifications and design without notice