EMCORE 1955FRW

1955 F/R/W Coaxial DFB Laser Diode
1550 nm CWDM 5 MHz – 4000 MHz
DATASHEET | AUGUST 2012
FIBER OPTICS
EMCORE’s Model 1955 DFB lasers offer a low cost solution for linear fiber optic
links. These components can be cooled with external thermo-electric coolers for
high stability, or run without TEC’s to reduce power consumption. The DFB laser
builds upon Ortel’s long history of high performance, leading edge designs in
CATV, wireless, and high speed digital applications. The laser diode devices are
packaged in a compact hermetic assembly together with monitor photodiode and
isolator, for flexible integration into various transmitter configurations.
Performance Highlights
Parameters
Applications
Operating Case Temperature Range
Video Signal Distribution in HFC and
FTTx Nodes
Signal Distribution in L-Band and
Wireless Remoting Links
High Linearity, Low Power Fiber Links
Optical Output Power
(1)
Frequency Range
Carrier-to-Noise Ratio (79 channels)
Features
(1)
Composite Second Order (79 channels)
Min
Typical
Max
Units
-40
3
-
85
C
-
4.9
5
-
5.9
6
-
8.9
9
-
9.9
10
-
11.9
dBm
5
-
4000
MHz
51
-
-
dB
dBc
(1)
Linear DFB Laser Design
Standard Linearity
-
-
-55
Ouput Power Up to 10 dBm Available
Enhanced Linearity
-
-
-57
Standard Linearity
-
-
-65
Enhanced Linearity
-
-
-68
45
-
-
dB
30
-
-
dB
Composite Triple Beat (79 channels)
Bandwidth 5 – 4000 MHz
RoHS Compliance
(1)
Single and Double Optical Isolator
Optical Return Loss
High Slope Efficiency up to 0.3mW/mA
Side Mode Suppression Ratio, CW
Monitor Photodiode
1. Performance at Tcase = 25°C
(1)
(1)
| REV 2012.08
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
dBc
1955 F/R/W Coaxial DFB Laser Diode
1550 nm CWDM 5 MHz – 4000 MHz
FIBER OPTICS
DATASHEET | AUGUST 2012
Absolute Maximum Ratings1
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.
Parameters
Symbol
Condition/Notes
Min
Max
Storage Temperature
TSTG
Non-Operating
-40
85
o
Operating Case Temperature
TOP
Continuous
-40
85
o
Laser Diode Forward Current
IOP
CW
-
150
mA
Laser Diode Reverse Voltage
VR
Continuous
-
1.0
V
Photodiode Forward Current
IMPD
Continuous
-
2
mA
Photodiode Reverse Voltage
VMPD,R
Continuous
-
10
V
PIN
60 Seconds
-
62
Average RF Input Power
Lead Soldering Temperature/Time
Relative Humidity
Unit
C
C
dBmV
o
-
-
-
260/10
RH
Continuous
-
85
%
-
Human Body Model
-500
+500
V
ESD
C/sec
1. Absolute maximum data are limited to system design only; proper device performance is not guaranteed over rating
listed above. Operation beyond these maximum conditions may degrade device performance, lead to device failure,
shorter lifetime, and will invalidate the device warranty.
Electrical/Optical Characteristics
Parameters
Optical Output Power
Symbol
PO
Threshold Current
ITH
Laser Bias Current
IOP
Forward Voltage
VF
Slope Efficiency
Thermal Slope Efficiency
Laser Input Impedance
MPD Current
MPD Dark Current
Relative Intensity Noise
Conditions/Notes
Min
Typ
Max
Unit
1955R opt model: 3-6dBm
-
4.9
5.9
8.9
9.9
11.9
dBm
1955F opt model: 3-10 dBm
3
5
6
9
10
Tcase = 25ºC
Tcase = 45ºC
-
8
13
15
20
mA
1955W opt model: 3-10 dBm
-
-
80
mA
Iop
-
1.17
1.8
V
SE
Tcase = 25ºC, Iop
0.07
-
0.3
mW/mA
TSE
SE(Tc)/SE(25ºC)
Tcase = -20ºC to 85ºC
0.4
-
1.2
-
Z
-
2
4
8

IMPD
VMPD = 5V, Iop
50
-
2000
A
ID
VMPD = 5V, Iop = 0
Tcase = 25ºC
-
-
50
nA
RIN
CW, Iop, Tcase = 25ºC
5 MHz - 1002 MHz
-
-
-150
dB/Hz
| REV 2012.08
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
1955 F/R/W Coaxial DFB Laser Diode
1550 nm CWDM 5 MHz – 4000 MHz
FIBER OPTICS
DATASHEET | AUGUST 2012
Electrical/Optical Characteristics (continued)
Parameters
Symbol
Min
Typ
Max
Unit
-1
-
+1
dB
45
30
-
-
dB
Iop
-
0.1
1.0
nm
SMSR
Iop
30
45
-
dB
ORL
Tcase = 25ºC
35
-
-
dB
Rise Time
tr
Tcase = 25ºC
-
0.05
0.10
ns
Fall Time
tf
Tcase = 25ºC
-
0.10
0.15
ns
ER
10log (2.omW/Pf (Ith))
10
-
-
dB
Symbol
Conditions/Notes
Min
Typ
Max
Unit
|S21|
47 MHz – 1002 MHz
5 MHz – 4000 MHz
-
-
1
4
dBp-p
47 MHz < f < 1002 MHz
-1
3
dB
CNR
Iop
51
-
-
dB
Standard Linearity
Enhanced Linearity
CSO
Iop
Tcase = 25ºC
-
-
-55
-57
dBc
Standard Linearity
Enhanced Linearity
CTB
Iop
Tcase = 25ºC
-
-
-65
-68
dBc
Tracking Error
ΔPf
Optical Isolation, Tcase = 25ºC
ISO
Spectral Width (-20 dB)

Side Mode Suppression Ratio
Optical Return Loss
Extinction Ratio
Conditions/Notes
IMON = const
ER = 10log(PO/2.0) [dB]
Double Isolator
Single Isolator
1. Referenced to base of TO header.
Forward Path RF Characteristics
1955F Performance Parameter
Frequency Response Flatness
Response Up-tilt
1
1
Carrier-to-Noise Ratio
2,3,4
Composite Second Order
Composite Triple Beat
2,3,4
2,3,4
1. Iop, Tcase = 25C. Test with the laser Input pin matched to a 50 system.
2. 3.7% OMI, 79 NTSC unmodulated carriers (50 MHz to 550 MHz). 10 km fiber.
3. Received power = 0 dBm.
4. Iop, Tcase = 25C. Test with the laser Input pin matched to a 75 system.
Return Path RF Characteristics
1955R Performance Parameters
Frequency Response Flatness
Second Order Distortion
Standard Linearity
Enhanced Linearity
Third Order Distortion
Standard Linearity
Enhanced Linearity
1
Symbol
Conditions/Notes
Min
Typ
Max
Unit
|S21|
5 MHz - 200 MHz
-
-
1
dBp-p
DSO
PF = 3 dBm, OMI = 10% each
2-tone test: f1=13MHz, f2=19MHz
20 km of fiber
(7.5 dB total loss with connector)
DSO meas at 6MHz, 32MHz
-
-
-45
-50
dBc
DTB
PF = 3 dBm, OMI = 10% each
2-tone test: f1=13MHz, f2=19MHz
20 km of fiber
(7.5 dB total loss with connector)
DTO meas at 7MHz, 25MHz
-
-
-63
-65
dBc
2
2
1. Iop, Tcase = 25C. Test with the laser Input pin matched to a 50 system.
2. Iop, Tcase = 25C. Test with laser input pin matched to a 75 system.
| REV 2012.08
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
1955 F/R/W Coaxial DFB Laser Diode
1550 nm CWDM 5 MHz – 4000 MHz
FIBER OPTICS
DATASHEET | AUGUST 2012
Wide Bandwidth Path RF Characteristics
1955W Performance Parameters
Frequency Response Flatness
Input Third Order Intercept
1dB Compression Point
1
2
3
Symbol
Conditions/Notes
Min
Typ
Max
Unit
|S21|
900 MHz – 4000 MHz
-
-
4
dBp-p
IIP3
Standard Linearity, Ibb
30
-
-
dBm
P1dB
Ibb
16
-
-
dBm
1. Iop, Tcase = 25C. Test with the laser Input pin matched to a 50 system.
2. IIP3 is measured at Ibb where Ibb is the bias point at which simultaneously the laser at its best linearity and the optical
power is within specification. Test Frequency F1 = 2700MHz, F2 = 2703MHz, RF in = 0dBm/frequency. 0km fiber.
3. Test at 2700MHz. 0km fiber.
Package Outline Drawing (dimensions are in mm)
Mounting Bracket
| REV 2012.08
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
1955 F/R/W Coaxial DFB Laser Diode
1550 nm CWDM 5 MHz – 4000 MHz
FIBER OPTICS
DATASHEET | AUGUST 2012
Reliability/Quality
Designed to meet qualification requirements of TelcordiaTM (Bellcore) GR-468-CORE.
Schematic and Pinout
Schematic and Pinout A
3
PD
4
2
LD
1
Pin Definitions for Pinout A
Pin
Description
1
2
3
4
LD Anode, Case Ground
LD Cathode
PD Cathode
PD Anode
Pinout A
Bottom View
Laser Safety
This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH Class 1 laser
product. This device has been classified with the FDA/CDRH under accession number 0220191.
All version of this laser are Class 1 laser product, tested according to IEC 60825-1:2007/EN 60825-1:2007
Single-mode fiber pigtail with SC/APC connectors (standard).
Wavelength = 1.3 m.
Maximum power = 50 mW.
Because of size constraints, laser safety labeling (including an FDA class 1 label) is not affixed to the module, but attached
to the outside of the shipping carton. Product is not shipped with power supply.
Caution: Use of controls, adjustments and procedures other than those specified herein may result in hazardous
laser radiation exposure.
| REV 2012.08
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.
1955 F/R/W Coaxial DFB Laser Diode
1550 nm CWDM 5 MHz – 4000 MHz
FIBER OPTICS
DATASHEET | AUGUST 2012
Ordering Code Definitions
1955x - a - bb - c - dddd - ww - yy - z
Family Name
1955F: Forward Path
1955R: Return Path
1955W: Wide Bandwidth
Distortion Performance
a = A: Standard Linearity
a = B: Enhanced Linearity (not available for 1955W)
Optical Isolator
bb = DI: Double Isolator (only available for optical 3 – 6dBm)
bb = SI: Single Isolator
Pinout
c = A: Pinout A
O-Band Wavelength
dddd = 1470:1470 nm
dddd = 1490:1490 nm
dddd = 1510:1510 nm
dddd = 1530:1530 nm
dddd = 1550:1550 nm
dddd = 1570:1570 nm
dddd = 1590:1590 nm
dddd = 1610:1610 nm
Fiber Length, Optical Connector
ww = FA: FC/APC, 900 micron buffer, 1.0 – 1.4 meter
ww = SA: SC/APC, 900 micron buffer, 1.0 – 1.4 meter
Optical Output Power
yy = 03: 3 dBm (2 mW)
yy = 05: 5 dBm (3 mW)
yy = 06: 6 dBm (4 mW)
yy = 09: 9 dBm (8 mW) – (only available for 1935F and 1935W)
yy = 10: 10 dBm (10 mW) – (only available for 1935F and 1935W)
Mounting Bracket
z = B: Mounting Bracket
z = N: No Mounting Bracket
Example
1955F-B-DI-A-1550-SA-10-N: Forward Path Uncooled 1550 nm CWDM Coaxial Laser, Enhanced Linearity, Double Isolator,
Pinout A, 1550 nm, SC/APC optical connector, 10 dBm optical power, no mounting bracket.
| REV 2012.08
Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.