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1742 18 GHz 1550 nm
Microwave DFB Laser
DATASHEET | AUGUST 2013
MICROWAVE
Applications
„„ Antenna Remoting
„„ Cellular and PCS Networks
„„ Military Communications
„„ Tracking, Telemetry, and Control
Features
„„ High-Dynamic-Range
„„ Long Distance Communications
„„ 10 MHz to 18 GHz Bandwidth
„„ Built-in Optical Isolator
„„ 1550 nm
The 1742 18 GHz 1550 nm Microwave Distributed Feedback (DFB)
Laser provides exceptional performance for linear fiber optics
communications in very wide bandwidth applications. EMCORE’s
linear fiber optics are an excellent alternative to using coaxial cable
systems to transmit 10 MHz to 18 GHz signals. They offer significant
improvements in reliability of microwave communications networks
by transmitting the RF signal in its original format. As a result of
these properties, the 1742 provides significant improvements in signal quality for
a wide variety of applications including antenna remoting, telemetry, timing and
reference signal distribution, measurement and delay lines.
The basic 1742 laser module can be integrated into a complete transmitter either
as a flange-mount for extreme environments, or as a plug-in for EMCORE’s Sys-
tem 10000 rack-mount system. Electronics within the flange-mount and plug-in
transmitters control the laser temperature and DC bias current and provide warn-
ings whenever the temperature or power deviates from their intended levels.
This provides a self-regulating, fully-integrated microwave product with excellent
noise performance in sensitive optical links.
Performance Highlights
Parameter
Available Wavelengths
Optical Output Power
Temperature Range
Frequency Range
Min Typ Max
1545 1550 1555
- 9-
-40 - +65
10 - 18000
Unit
nm
dBm
°C
MHz
Typical Data
© 2013 EMCORE Corporation | REV 2013.08
+1 626-293-3400
satcom-sales@emcore.com
www.emcore.com
Information contained herein is deemed to be reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specifications at any time without notice.

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1742 18 GHz 1550 nm
Microwave DFB Laser
DATASHEET | AUGUST 2013
MICROWAVE
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress
ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in
the operational sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect
device reliability.
Parameter
Operating Temperature Range of Baseplate
Storage Temperature
RF Input Power
Laser Forward dc Current
Photodiode Reverse Voltage
Laser Reverse Voltage
ESD
TEC Current
Symbol
TOP
TSTG
PIN
-
VRPD
-
-
ITEC
Electrical Characteristics
Condition
Continuous
-
60 Seconds
-
-
-
HMB: R = 1500 Ohm, C = 100 pF
Continuous
Min Max
-40 +65
-40 +85
- 20
25 120
200 10
-1
-500 500
-1.9 1.9
Parameter
Specifications
Unit
Wavelength
1550 to + 5
nm
Spectral Width, FWHM2, Typ., Max
10
MHz
Optical Power, Typical @ ITH +55 mA
8 (min)
dBm
Optical Power Stability vs. Temperature
+ 15
%
dc Modulations Gain, Typical
0.24
-
1. Specifications guaranteed when unit is connected to an optical path with return loss >35 dB.
2. No RF Input.
DC
Parameter
Laser Bias
Threshold Current
Forward Voltage
Thermo Electric Cooler
Thermistor
Thermistor Temperature Coefficient
Symbol
IOP
ITH
VF
ITEC
RTH
TETH
Condition
25°C
25°C
IOP = ITH + 50 mA
-
25°C
25°C
Min
-
-
-
-1.1
9.5
-
Max
65
26
6
-
10
4.4
Unit
˚C
˚C
dBm
mA
V
V
V
A
Units
mA
mA
V
A
kΩ
% / °C
Seven-Pin Miniature Rectangular Connector
Pin Description
A Thermistor
B TEC (-)
C Thermistor
D TEC (+)
E Laser Bias
F Ground
G Monitor Photodiode
© 2013 EMCORE Corporation | REV 2013.08
+1 626-293-3400
satcom-sales@emcore.com
www.emcore.com
Information contained herein is deemed to be reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specifications at any time without notice.

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1742 18 GHz 1550 nm
Microwave DFB Laser
DATASHEET | AUGUST 2013
RF Characteristics
Parameter
Specifications
1742B
1742C
1742D
Unit
Maximum Frequency
7 13 18 GHz
Minimum Frequency
0.01 GHz
Amplitude Flatness1&2
4.0 4.0 5.0 dB p-p
Input Return Loss (50 Ω)
7.0 4.0 4.0 dB
Input 1 dB Compression
+20 dBm
Input Third Order Intercept3
0.01 GHz - 7.0 GHz
7.0 GHz - 18.0 GHz
+30
+25
Noise Figure (dB)4
0.01 GHz - 3.0 GHz
3.0 GHz - 7.0 GHz
7.0 GHz - 13.0 GHz
13.0 GHz - 18.0 GHz
47 47 47
50 50 50
- 54 54
- - 59
1. Specifications guaranteed when unit is connected to an optical path with return loss >35 dB.
2. Peak to Peak
3. Two Carrier Test
4. No RF Input
Mechanical Drawing (dimension are in inches)
Electrical Schematic
MICROWAVE
© 2013 EMCORE Corporation | REV 2013.08
+1 626-293-3400
satcom-sales@emcore.com
www.emcore.com
Information contained herein is deemed to be reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specifications at any time without notice.

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1742 18 GHz 1550 nm
Microwave DFB Laser
DATASHEET | AUGUST 2013
Ordering Information
1742n-yy-zz
Frequency (n)
7 GHz
13 GHz
18 GHz
Option Code
B
C
D
RF Connector (yy)
SMA Male
SMA Female
Option Code
SM
SF
MICROWAVE
Optical Connector (zz)
No optical connector, 900m buffered pigtail
FC/APC optical connector, 900m buffered pigtail
SC/APC, optical connector, 900m buffered pigtail
Option Code
PG
FA
SA
Laser Safety
This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH Class 1M laser
product. This device has been classified with the FDA/CDRH under accession number 0220191. All versions of this laser are
Class 1M laser product, tested according to IEC 60825-1:2007 / EN 60825-1:2007. An additional warning for Class 1M laser prod-
ucts. For diverging beams, this warning shall state that viewing the laser output with certain optical instruments (for example,
eye loupes, magnifiers and microscopes) within a distance of 100 mm may pose an eye hazard. For collimated beams, this
warning shall state that viewing the laser output with certain optical instruments designed for use at a distance (for example,
telescopes and binoculars) may pose an eye hazard.
Wavelength = 1.5 µm.
Maximum power = 30 mW.
*Caution: Use of controls, adjustments and procedures other than those specified herein may result in hazardous laser radiation exposure.
*IEC is a registered trademark of the International Electrotechnical Commission.
© 2013 EMCORE Corporation | REV 2013.08
+1 626-293-3400
satcom-sales@emcore.com
www.emcore.com
Information contained herein is deemed to be reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specifications at any time without notice.