1550nm External Modulate Fiber Optical Transmitter with DFB La'ser for Cable TV
Products Description

Brief Introduction

The transmitting modules of this machine adopt the imported DFB la'ser named Agere (ORTEL, Lucent), Mi'tsubishi, Fujitsu, AOI, and so on. The internal R'F driving amplifier and controlling circuit of this machine can ensure the best C/N. The perfect and stable circuit of optic power output and controlling circuit of the thermoelectric refrigeration device of the la'ser module assures the user of the best quality and stable working for a long time. The internal microprocessor software has many functions such as la'ser moni'toring, number display, trouble alarm, and on-line management. Once the working parameter of the la'ser is out of the fixed range, there will be a red light glistening to alarm. The RS-232 standard connector makes it is possible to manage online and moni'tor in another place. The machine adopts a 19” standard shelf and it can work with the voltage from 110V to 254V.

Features

•High performance: Externally modulated technology, no la'ser chirp, low dispersion distortion, high extinction ratio, with excellent characteristic within 40~862MHz. •Narrow bandwidth (0.65MHz), lower noise, DFB continuous-wave la'ser, is propitious to reduce the influence of the dispersion. •The operating bandwidth is up to 47~862MHz (47~1080MHz). •CNR ≥ 53dB and excellent CTB, CSO index. •SBS: 13~18dBm adjustable. •ITU standard wavelength, ±200GHz (±1.6nm) adjustable. •AGC/MGC mode is optional at the spot. OMI can be optimized at the spot. •Perfect RS232 communication interface. •Advanced SNMP network management function. •1+1 power supply backup, switch automatically. •Casing temperature auto-control. •Excellent P/P ratio. Applications •Used in main links and distribution network links in large and middle CATV station head-end. Analog-digital hybrid transmission >200Km (with dispersion compensation). Pure digital transmission (without dispersion compensation) >400Km, (with dispersion compensation) >700Km. •ST1550EU ITU wavelength adjustable, applicable to the value-added service of DWDM fiber optic CATV system and CFG dispersion compensation system. •It can be used in branch FTTH that has high system index demand. Point to Point>65Km, CSO ≤ -65dB. It can provide highly qualified and reliable value-added service such as RFTV, IP'TV, and VOD for the secondary users. It can also avoid the limitation of CSO deterioration and transmission distance caused by la'ser chirp for adopting a 1550nm direct modulated optical transmitter.
Details Images
Product Paramenters

1310nm Optical Transmitter
Model(ST1310)
-4
-6
-8
-10
-12
-14
-16
-18
-20
Optic Power (mW)
≥04
≥06
≥08
≥10
≥12
≥14
≥16
≥18
≥20
Optic Power (dBm)
6
7.8
9
10
10.8
11.5
12
12.3
12.8
Optic Wavelength (nm)
1290～1310
Fiber Connector
FC/APC、SC/APC、SC/UPC (Selected by the Customer)
Working Bandwidth (MHz)
47～862
Channels
59
CNR (dB)
≥51
CTB (dBc)
≥65
CSO (dBc)
≥60
R'F Input Level (dBμV)
Not with pre-distortion
78±5
With pre-distortion
83±5
Band Unflatness
≤0.75
Power Consumption (W)
≤30
Power Voltage (V)
220V(110～254)
Working Tem (℃)
0～45
Size (mm)
483×370×44

1550nm Internal Modulation Optical Transmitter
Model (ST1550I)
-04
-06
-10
-12
Optic Power （mW）
4
6
10
12
Optic Power （dBm）
6.0
8.0
10.0
10.8
Optic Wavelengt （nm）
1550±20
Fiber Connector
FC/APC、SC/APC、SC/UPC (Selected by the Customer)
Working Bandwidth (MHz)
47～862
Channels
59
CNR （dB）
≥51
CTB （dB）
≥65
CSO （dB）
≥-60
R'F Input Level (dBμV)
Not with pre-distortion
78±5
With pre-distortion
83±5
Band Unflatness
≤0.75
Power Loss (W)
≤30
Power Voltage (V)
220V(110～254) OR -48VDC
Working Tem (℃)
-20～85
Size (mm)
483×370×44

1550nm External Modulation Optical Transmitter
Performance
Index
Supplement







Optic Feature
Operating wavelength
(nm)
1548~1563
ST1550EC
ITU-TG.692
ST1550EU
Wavelength ADJ. range
(nm)
±1.6(±200GHz)
ST1550EC
Wavelength ADJ. mode
±0.05nm stepping
ST1550EU
Wavelength stability
(Pm/℃)
-1~0
Tc=20~70℃
Linewidth
(MHz)
Typ.=0.65
FWHM(△λ), (-3dB fullwidth)
Side mode suppression ratio
(dB)
≥45
SMSR
Equivalent noise intensity
≤-160
RIN(20~1000MHz)
Number of output port
2
Optional4,6
Output power
(dBm)
10, 8.5, 7.0, 4.5
2×7, 2×9, 2×10, 2×5, 4×7,6×7
Return loss
(dB)
≥50
Optical connector
FC/APC
Optional SC/APC, LC/APC



R'F Feature
Work bandwidth
(MHz)
47~862
Input level
(dBmV)
18~28
AGC
Flatness
(dB)
≤±0.75
47~862MHz
Return loss
(dB)
>16
Input impedance
(Ω)
75
R'F port
F-Female




Link Feature
Transmit channel
PAL-D/60CH
PAL-D/99CH
CNR1
(dB)
≥53.0
≥51.5
Back to Back
CNR2
(dB)
≥51.5
≥49.5
65Km optical fiber, 0dBm receive
CTB
(dB)
≥-65
≥-65
CSO
(dB)
≥-65
≥-65
SBS restrain
(dBm)
13~18
Adjustable







General Feature
SNMP network management interface
RJ45
Communication interface
RS232
Power supply
(VAC)
90~265
50/60Hz
(VDC)
-48
30~72VDC
Power consume
(W)
50
Single power works
Work temp.
(℃)
-5~65
Machine temp. control automatically
Storage temp.
(℃)
-40~85
Operating relative humidity
(%)
5~95
size
(")
19×14.5×1.75
S-Type
19×17.9×1.75
L-Type
Product Packaging