SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone ++49 30 772 051-0 • Fax ++49 30 753 10 78
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF 46123 AOptical Transmitter
1310 nm + 1550 nm

SHF reserves the right to change specifications and design without notice – SHF 46123 A - V001 – July 27, 2017

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Description
The SHF 46123 A is a stand-alone optical transmitter unit.
The transmitter works in C+L band and O band.
This optical transmitter converts electrical signals into optical signals at a data rate of > 56 Gbps in ASK(amplitude shift keying) format.
PAM signal generation is possible up to ~ 56 GBaud when driving the data input with an electrical PAMsignal.
The main element of the SHF 46123 A is a thermally stable Lithium Niobate Mach-Zehnder modulator
which is driven by an individually optimized amplifier.
The temperature stable modulator and an automatic bias circuit ensure high stability of the output signal.

Features
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Dual-band 1310 nm and 1550 nm operation
56 Gbps NRZ optical data stream generation
Fast rise and fall time of < 10 ps compressed digital optical signals
Capable of PAM 4 up to 56 GBaud
Modulators’ DC bias condition controlled automatically
SONET/SDH compatible
Stressed eye generation for optical compliance testing
Selectable slope (positive slope / negative slope)
Option ‘Low power’ available for optical input power 0…10 dBm

Functional block diagram

Modulator
MZ

DatadriverCW
Light in

DatainDC BiasABC

Modulated
Light out

AC-coupled
SHF reserves the right to change specifications and design without notice – SHF 46123 A - V001 – July 27, 2017

Page 2/6Specifications – SHF 46123 A
Parameter

Unit

Min.

Typ.

Max.

Conditions

Absolute Maximum Ratings
Optical Input PowerdBm

17

Data Input LevelVpp2

DC Input Voltage

V9Wavelength Range

nm1260 - 1360, 1530 - 1625
O band, C+L-band

Insertion Loss

dB

10.5
8DC Extinction Ratio

dB

20Return Loss

dB

tbd

Optical Parameters

1291310 nm band
1550 nm band, *Note

Electrical and electro-optical parameters (measured at 1550 nm)
EO Bandwidth of Modulator

GHz35-3dB electrical

EO Bandwidth of Transmitter

GHZ35-3dB electrical

Optical input powerdBm

Min. Bit Rate

Gbps

Max. Bit Rate

Gbps

Electrical Return Loss of Data Input

dB10

Data Input Level

Vpp0.10.30.6

Dynamic Extinction Ratio range

dB0

Dynamic Extinction Ratio

dB10911161018

Dynamic Signal to Noise Ratio

Output Rise and Fall Times

ps615010Standard ABC operating
range
Option low power

250

Criteria: Ext.Ratio & S/N@ PRBS 27-1 … 231-1

567

1 MHz – 20 GHz

ExtRatio = 2 dB
ExtRatio = 6 dB
ExtRatio = 12 dB

13

ABC operating range
Data input level : 0.4 V …
0.7 V,  50 Gbps

 56 Gbps, PRBS
Data input level : 0.4 V …
0.7 V,  50 Gbps

 56 Gbps, PRBS

tbdExtRatio >10 dB
ExtRatio  7 dB **Note***NoteOutput Timing Jitter <RMS>
ps1.01.2* Note connector to connector, modulator at quadrature point** Note: rise time 20%…80% as displayed on 70 GHz oscilloscope using a 50 GHz detector*** Note: Measured with SHF Pattern Generator, prec. timebase DCA. De-embedded from 32 Gbps
NRZ electrical data source.

SHF reserves the right to change specifications and design without notice – SHF 46123 A - V001 – July 27, 2017

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Electrical and electro-optical parameters
Crossing NRZ%

455055* NoteAuto-bias control (ABC)
Dither Signal Frequency

kHz

1* Note: Input crossing = 50 %, signal measured @ ExtRatio 0…13 dB

General specifications
Parameter

Unit

Min.

Typ.

Weightkg

0.82

Dimensions (W x H x D)mm

221 x 51 x 177

Power Consumption

W

10

Operating Temperature°C

10Conditions
w/o Frontpanel Connectors

35

Electrical Data Input Connector
Optical Connectors

Max.

V (1.85 mm) female

FC/PC* NotePMF in, key aligned toslow axis,
SMF out* Note: Other connectors available on request

SHF reserves the right to change specifications and design without notice – SHF 46123 A - V001 – July 27, 2017

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Typical transmitter output signals
Data source: SHF 12104 BPG + SHF 613 DAC, using a 50 GHz bandwidth PIN detector.
Binary (NRZ)

50 GBit/s

56 GBit/s

Linear operation
220 mVpp data
drive amplitude

S/N:
9.3
Jitter:666 fs
Crossing: 47 %ExtRatio: 4.9 dB

S/N:
8.1
Jitter:647 fs
Crossing: 49 %ExtRatio: 4.8 dB

S/N:
22
Jitter:527 fs
Crossing: 52 %ExtRatio: 12.8 dB

S/N:
18
Jitter:597 fs
Crossing: 53 %ExtRatio: 12.4 dBcompressed
operation
660 mVpp data
drive amplitude

50 GBaud

56 GBaud

PAM4220 mVpp data
drive amplitude

SHF reserves the right to change specifications and design without notice – SHF 46123 A - V001 – July 27, 2017

Page 5/6

Outline Drawing
SHF 46123 A

Optical Transmitter

PowerData
Input

FC

50  / 1.85 mm Female

OnOff

OpticalOutputOutputs
Error

OnOff50,9

Optical
Input

FC

221,5

5,3

25,2

177

6,5

21,2

9,4
7,213232,524,1100
137,5ecb

ManualBias

ABC Cal.
Neg. Slope

Designation
Optical Input
Data Input
Optical Output

Connector
FC
1.85 mm (V) Female
FC

Pos. SlopePos.
123d12 V / 1 A

aPos.
abcde

Designation
ABC Calibration
Positive Negative Slope switch
GND
Manual Bias
Power Supply

All dimensions are specified in millimeters (mm).

SHF reserves the right to change specifications and design without notice – SHF 46123 A - V001 – July 27, 2017

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