1935 F/R/W Coaxial DFB Laser Diode
O-Band CWDM 5 MHz – 4000 MHz
DATASHEET | AUGUST 2012
FIBER OPTICS
Electrical/Optical Characteristics (continued)
Parameters
Symbol
Conditions/Notes
Min
Typ
Max
Unit
IMON = const
ER = 10log(PO/2.0) [dB]
Tracking Error
ΔPf
-1
-
+1
dB
Optical Isolation, Tcase = 25ºC
Spectral Width (-20 dB)
ISO
Double Isolator
45
-
-
0.1
45
-
-
1.0
-
dB
nm
dB
dB
Iop
Iop
Side Mode Suppression Ratio
Optical Return Loss
SMSR
ORL
30
35
Tcase = 25ºC
-
1. Referenced to base of TO header.
Forward Path RF Characteristics
1935F Performance Parameter
Frequency Response Flatness 1
Response Up-tilt 1
Symbol
Conditions/Notes
Min
Typ
Max
Unit
47 MHz – 1002 MHz
5 MHz – 4000 MHz
-
-
-
-
1
4
|S21|
dBp-p
47 MHz < f < 1002 MHz
Iop
-1
3
-
dB
dB
Carrier-to-Noise Ratio 2,3,4
Composite Second Order 2,3,4
CNR
CSO
51
-
Iop
Standard Linearity
-
-
-
-
-57
-60
dBc
dBc
Tcase = 25ºC
Enhanced Linearity
Composite Triple Beat 2,3,4
Iop
Standard Linearity
Enhanced Linearity
CTB
-
-
-
-
-65
-68
Tcase = 25ºC
1. Iop, Tcase = 25C. 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 = 25C. Test with the laser Input pin matched to a 75 system.
Return Path RF Characteristics
1935R Performance Parameters
Symbol
Conditions/Notes
Min
Typ
Max
Unit
Frequency Response Flatness 1
|S21|
5 MHz - 200 MHz
-
-
1
dBp-p
PF = 3 dBm, OMI = 10% each
2-tone test: f1=7MHz, f2=56MHz
20 km of fiber
Second Order Distortion 2
Standard Linearity
Enhanced Linearity
DSO
-
-
-
-
-52
-58
dBc
dBc
(7.5 dB total loss with connector) f1 + f2
PF = 3 dBm, OMI = 10% each
2-tone test: f1=7MHz, f2=56MHz
20 km of fiber
Third Order Distortion 2
Standard Linearity
Enhanced Linearity
DTB
-
-
-
-
-63
-65
(7.5 dB total loss with connector) 2f2-f1
1. Iop, Tcase = 25C. Test with the laser Input pin matched to a 50 system.
2. Iop, Tcase = 25C. 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.