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| REV
2012.05
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Applications
   ! " 
" # # $ % 
 & '( 
)  & * 
! &  +&  , " & * 
Features
&  " ( &   
 ,  - . / ( 0 
(  1 2 / / / ! 3
!  
 
&  ,  
, 
EMCORE’s Model 1933 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 Min Typical
Max Units
Operating Case Temperature Range -40 - 85 °C
Optical Output Power
(1)
3 - 5.9 dBm
Frequency Range 5 - 4000 MHz
Carrier-to-Noise Ratio (79 channels)
(1)
51 - - dB
Composite Second Order (79 channels)
(1)
dBc
Composite Triple Beat (79 channels)
(1)
dBc
Center Wavelength 1300 - 1320 nm
Optical Return Loss
(1)
35 - - dB
Side Mode Suppression Ratio, CW
(1)
30 - - dB
1. Performance at Tcase = 25°C

        
1310 nm, Wide Bandwidth 5 MHz – 4000 MHz
DATASHEET | MAY 2012
FIBER OPTICS
|
REV
2012.05
       
Absolute Maximum Ratings
1
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 Unit
Storage Temperature T
STG
Non-Operating -40 85
o
C
Operating Case Temperature T
OP
Continuous -40 85
o
C
Laser Diode Forward Current I
OP
CW - 150 mA
Laser Diode Reverse Voltage V
R
Continuous - 1.0 V
Photodiode Forward Current I
MPD
Continuous - 2 mA
Photodiode Reverse Voltage V
MPD,R
Continuous - 10 V
Average RF Input Power PIN 60 Seconds - 62 dBmV
Lead Soldering Temperature/Time - - - 260/10
o
C/sec
Relative Humidity RH Continuous - 85 %
ESD - Human Body Model -500 +500 V
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 Symbol
Conditions/Notes Min Typ Max Unit
Optical Output Power
P
O
1933R opt model: 3 – 6dBm
1933W opt model: 3 – 10dBm
1933F opt model: 3 – 10dBm
3
5
6
9
10
-
-
-
-
-
4.9
5.9
8.9
9.9
11.9
dBm
Threshold Current I
TH
T
case
= 25ºC
T
case
= 45ºC -
- 8
13 15
20 mA
Laser Bias Current I
OP
- - 80 mA
Forward Voltage V
F
I
op
- 1.17 1.8 V
Slope Efficiency SE T
case
= 25ºC, I
op
0.07 - 0.3 mW/mA
Thermal Slope Efficiency TSE SE(Tc)/SE(25ºC)
T
case
= -20ºC to 85ºC 0.4 - 1.2 -
Laser Input Impedance Z - 2 4 8 Ω
MPD Current I
MPD
V
MPD
= 5V, I
op
200 - 2000 µA
MPD Dark Current I
D
V
MPD
= 5V, I
op
= 0
T
case
= 25ºC - - 50 nA
Center Wavelength λ
c
I
op
1300 - 1320 nm
Relative Intensity Noise RIN CW, I
op
, T
case
= 25ºC
5 MHz - 1002 MHz - - -150 dB/Hz
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1310 nm, Wide Bandwidth 5 MHz – 4000 MHz
DATASHEET | MAY 2012
FIBER OPTICS
|
REV
2012.05
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Electrical/Optical Characteristics
(continued)
Parameters Symbol
Conditions/Notes Min Typ Max Unit
Tracking Error Pf I
MON
= const
ER = 10log(P
O
/2.0) [dB] -1 - +1 dB
Optical Isolation, T
case
= 25ºC ISO Double Isolator 45 - - dB
Spectral Width (-20 dB) ∆λ I
op
- 0.1 1.0 nm
Side Mode Suppression Ratio SMSR I
op
30 45 - dB
Optical Return Loss ORL T
case
= 25ºC 35 - - dB
1. Referenced to base of TO header.
Forward Path RF Characteristics
1933F Performance Parameter Symbol
Conditions/Notes Min Typ Max Unit
Frequency Response Flatness
1
|S
21
| 5 MHz - 1002 MHz - - 1 dB
p-p
Response Up-tilt
1
5 MHz - 1002 MHz -1 3 dB
Carrier-to-Noise Ratio
2,3,4
CNR I
op
51 - - dB
Composite Second Order
2,3,4
Standard Linearity
Enhanced Linearity
CSO I
op
T
case
= 25ºC
-
-
-
-
-57
-60 dBc
Composite Triple Beat
2,3,4
Standard Linearity
Enhanced Linearity
CTB I
op
T
case
= 25ºC
-
-
-
-
-65
-68 dBc
1. I
op
, T
case
= 25°C. Test with the laser Input pin matched to a 50Ω system.
2. 3.7% OMI, 79 NTSC unmodulated carriers (50 MHz to 550 MHz). 10 km fiber.
3. Received power = 0 dBm.
4. I
op
, T
case
= 25°C. Test with the laser Input pin matched to a 75Ω system.
Return Path RF Characteristics
1933R Performance Parameters Symbol
Conditions/Notes Min Typ Max Unit
Frequency Response Flatness
1
|S
21
| 5 MHz - 200 MHz - - 1 dB
p-p
Second Order Distortion
2
Standard Linearity
Enhanced Linearity DSO
P
F
= 3 dBm, OMI = 10% each
2-tone test: f1=7MHz, f2=56MHz
20 km of fiber
(7.5 dB total loss with connector) f1 + f2
-
-
-
-
-52
-58 dBc
Third Order Distortion
2
Standard Linearity
Enhanced Linearity DTB
P
F
= 3 dBm, OMI = 10% each
2-tone test: f1=7MHz, f2=56MHz
20 km of fiber
(7.5 dB total loss with connector) 2f2-f1
-
-
-
-
-63
-65 dBc
1. I
op
, T
case
= 25°C. Test with the laser Input pin matched to a 50Ω system.
2. I
op
, T
case
= 25°C. Test with laser input pin matched to a 75Ω system.

        
1310 nm, Wide Bandwidth 5 MHz – 4000 MHz
DATASHEET | MAY 2012
FIBER OPTICS
|
REV
2012.05
       
Wide Bandwidth Path RF Characteristics
1933W Performance Parameters Symbol
Conditions/Notes Min Typ Max Unit
Frequency Response Flatness
1
|S
21
| 900 MHz – 4000 MHz - - 4 dB
p-p
Input Third Order Intercept
2
IIP3 Standard Linearity, I
bb
30 - - dBm
1dB Compression Point
3
P
1dB
I
bb
16 - - dBm
Tc = 25°C, Iop
Constant opt power
-150 - - dB/Hz
Relative Intensity Noise
4
(BW = 50MHz – 2GHz) RIN Tc = -20°C to +85°C, Iop
Constant opt power -145 - - dB/Hz
1. I
op
, T
case
= 25°C. Test with the laser Input pin matched to a 50Ω system.
2. IIP3 is measured at I
bb
where I
bb
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.
4. Guaranteed by design. Not to be tested in production
Package Outline Drawing (dimensions are in mm)
Mounting Bracket

        
1310 nm, Wide Bandwidth 5 MHz – 4000 MHz
DATASHEET | MAY 2012
FIBER OPTICS
|
REV
2012.05
       
Reliability/Quality
Designed to meet qualification requirements of Telcordia
TM
(Bellcore) GR-468-CORE.
Schematic and Pinout
Schematic and Pinout A Pin Definitions for Pinout A
Schematic and Pinout C Pin Definitions for Pinout C
Pin Description
1 LD Anode, Case Ground
2 LD Cathode
3 PD Cathode
4 PD Anode
Pin Description
1 Case
2 LD Cathode
3 PD Anode
4 LD Anode, PD Cathode
1
2
3
4
PD
LD
Pinout A
1
2
3
4
PD
LD
Pinout A
Bottom View
Bottom View

        
1310 nm, Wide Bandwidth 5 MHz – 4000 MHz
DATASHEET | MAY 2012
FIBER OPTICS
|
REV
2012.05
       
Laser Safety
This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH Class IIIb
laser product. This device has been classified with the FDA/CDRH under accession number 0220191.
Wavelength = 1.3 µm.
Maximum power = 50 mW.
Because of size constraints, laser safety labeling (including an FDA class IIIb 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.

        
1310 nm, Wide Bandwidth 5 MHz – 4000 MHz
DANGER
INVISIBLE LASER RADIATION
IS EMITTED FROM THE END
OF FIBER OR CONNECTOR
Avoid direct exposure to beam
Do not view beam directly with
optical instruments
INVISIBLE LASER RADIATION EMITTED FROM END OF FIBER OR CONNECTOR
Avoid exposure to beam
Class 3B Laser Product IEC-60825 1993 Max. Output: 50 mW Wavelength: 1.3
µ
m
DANGER
INVISIBLE LASER RADIATION
Max. Output: 50 mW,
Class IIIb Laser Product
AVOID DIRECT EXPOSURE TO BEAM
Wavelength: 1.3
µ
m
DATASHEET | MAY 2012
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REV
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       
Ordering Code Definitions
1933F - a - ww - x - yy - zz - v
Example
1933F-B-DI-A-SA-10-N: Forward Path Uncooled Coaxial Laser, Enhanced Linearity, Double Isolator, Pinout A, SC/APC
optical connector, 10dBm optical power, No Mounting Bracket


    
1310 nm, Wide Bandwidth 5 MHz – 4000 MHz
Family Name
1933F: Forward Path, Uncooled, Coaxial Laser
1933R: Return Path, Uncooled, Coaxial Laser
1933W: Wideband, Uncooled, Coaxial Laser
Pinout
x = A: Pinout A
x = C: Pinout C
Distortion Performance
a = A: Standard Linearity
a = B: Enhanced Linearity (not available for 1933W)
Fiber Length, Optical Connector
yy = FA: FC/APC, 900 micron buffer, 1.0 – 1.4 meter
yy = SA: SC/APC, 900 micron buffer, 1.0 – 1.4 meter
Optical Output Power
zz = 03: 3 dBm (2 mW)
zz = 05: 5 dBm (3 mW)
zz = 06: 6 dBm (4 mW)
zz = 09: 9 dBm (8 mW) – (only available for 1933F and 1933W)
zz = 10: 10 dBm (10 mW) – (only available for 1933F and 1933W)
Mounting Bracket
v = B: Mounting Bracket
v = N: No Mounting Bracket
Optical Isolator
ww = DI: Double Isolator (only available for optical 3 – 6dBm)
ww = SI: Single Isolator