CATV fiber transmitter

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Built-in EDFA based CATV Fiber Transmitter

Features

NGB (Next Generation Broadcasting)

Full C-band tunable (tuning range>35nm)

1550nm Externally Modulated Optical Transmitter

RoHS Compliant and Lead-Free

Excellent cost performance

1+1 power backup, support hot plug-ing

SPOTLIGHT

1550nm direct modulation CATV fiber transmitter built-in EDFA. It adopts high linearity, low chirp DFB laser, built-in pre-distortion compensation and APC

Applications

Provide IPTV, VOD value-added service in second-grade service area (Sub-HE).

Analog digital mixed transmit

Pure digital load <40Km.

WDM narrow band multiplex >70Km.

Description

External modulation technology, with the laser working in direct current, has the advantage of no laser chirp, low dispersion distortion, large extinction ratio, and high speed. It also has the disadvantage of high cost and high difficulty in manufacturing.

Direct modulation will lead to high laser chirp (Laser's bias current is modulated by signal and the optical spectrum shifts and shakes). Laser chip will interact with dispersion effect caused by standard single mode fiber (SMF-28), which will generate serious distortion in the place of 1550nm. This kind of distortion will become more serious with the increase of transmission distance, bandwidth and channel number.

At present, international high performance 1550nm direct modulation has no obvious performance inferior while transmitting an analog and digital multiplexing full channel signal with transmission distance ≤ 15Km or transmitting digital load with transmission distance ≤ 40Km.

Fiberbit's Built in EDFA based CATV fiber transmitter is a kind of 1550nm direct modulation optical transmitter built-in EDFA. It adopts high linearity, low chirp DFB laser, built-in pre-distortion compensation and APC, ATC closed loop control. A built-in low noise EDFA can supply 1~8 way, 13~17dBm output power. It can be used in FTTx ( ≤ 10Km) of second-grade service area (Sub-HE), also can be used in WDM narrow band multiplex and IP/QAM.

Detailed Features

Low chirp, high linearity DFB laser, chirp compensation.

Dual module RF driver , high efficient laser pre-distortion adjustment.

Perfect APC, ATC closed loop control

Intuitionist modulation status display.

Built-in dual power supply back-up, switch automatically.

Casing temperature auto-control, ensure the long life of the laser.

Specifications

Performance

Index

Supplement

Optic feature
Wavelength
(nm)

1548~1563

FB-CT-1550-ED: CATV wavelength

1530~1563

FB-CT-ITU-1550-ED: ITU wavelength

Linewidth
(MHz)

≤1

FWHM(△λ)

Side mode suppression ratio
(dB)

≥45

SMSR

Extinction ratio
(dB)

≥20

Equivalent noise intensity
(dB/Hz)

≤-160

RIN(20~1000MHz)

Total output power
(dBm)

17~24

Return loss
(dB)

≥60

Each port output power
(dBm)

10~17

Number of output port
1~8

Differeace of each output power

(dB)

±0.5

Polarization dependence gain

(dB)

≤0.4

Polarzation mode dispersion

(dB)

≤0.4

Pump power leakage

(dB)

≤-40

optical fiber connector
FC/APC

SC/APC options

RF feature
Work bandwidth
(MHz)

45-862

Input level
(dBmV)

20

±2 (MGC)

Flatness
(dB)

≤±0.75

45~862MHz

Return loss
(dB)

>16

Input impedance
(Ω)

75

RF/INPUT

RF test
(dB)

0±1

Link feature
Transmit channel
PAL-D/60CH

NTSC/80CH

CNR
(dB)

≥49

-1dBm receive

CTB
(dB)

≤-63

CSO
(dB)

≤-57

SBS restrain
(dBm)

≥17

General feature
Network management interface
RJ45, RS232

Support I.E. & SNMP

Power supply
(V)

90~265 city power

-48VDC optional

Power Consume
(W)

≤50

Single power works

Work temp.
(℃)

-5~65

Storage temp.
(℃)

-40~85

Work relative humidity
(%)

5~95

Size (W)x(D)x(H)
19×14.7×1.75 ( " )
483×373×44 ( mm )

Ordering Information

FB-CT-ITU-1550-ED-XX-YY CATV fiber transmitter built-in EDFA, output power XX = 17. 20, 22, 23 dbm, YY - distance i km, 5, 10 or 15 km, ITU band.

FB-CT-1550-ED-XX-YY CATV fiber transmitter built-in EDFA, output power XX = 17. 20, 22, 23 dbm, YY - distance i km, 5, 10 or 15 km, CATV band.

Accessories

SELF STUDY BLOG

SELF STUDY BLOG

Ethernet Fiber Conversion

FTTX Access

Video | Audio | Data Over Fiber

Optical Multiplexing & Switching systems

CATV & Broadband signal transmission

Fiber Transceivers (SFP, XFP, etc)

Built-in EDFA based CATV Fiber Transmitter

Features

SPOTLIGHT

Applications

Description

Detailed Features

Specifications


Performance			Index	Supplement
Optic feature	Wavelength	(nm)	1548~1563	FB-CT-1550-ED: CATV wavelength
	Wavelength	(nm)	1530~1563	FB-CT-ITU-1550-ED: ITU wavelength
	Linewidth	(MHz)	≤1	FWHM(△λ)
	Side mode suppression ratio	(dB)	≥45	SMSR
	Extinction ratio	(dB)	≥20
	Equivalent noise intensity	(dB/Hz)	≤-160	RIN(20~1000MHz)
	Total output power	(dBm)	17~24
	Return loss	(dB)	≥60
	Each port output power	(dBm)	10~17
	Number of output port		1~8
	Differeace of each output power	(dB)	±0.5
	Polarization dependence gain	(dB)	≤0.4
	Polarzation mode dispersion	(dB)	≤0.4
	Pump power leakage	(dB)	≤-40
	optical fiber connector		FC/APC	SC/APC options
RF feature	Work bandwidth	(MHz)	45-862
	Input level	(dBmV)	20	±2 (MGC)
	Flatness	(dB)	≤±0.75	45~862MHz
	Return loss	(dB)	>16
	Input impedance	(Ω)	75	RF/INPUT
	RF test	(dB)	0±1
Link feature	Transmit channel		PAL-D/60CH	NTSC/80CH
	CNR	(dB)	≥49	-1dBm receive
	CTB	(dB)	≤-63
	CSO	(dB)	≤-57
	SBS restrain	(dBm)	≥17
General feature	Network management interface		RJ45, RS232	Support I.E. & SNMP
	Power supply	(V)	90~265 city power	-48VDC optional
	Power Consume	(W)	≤50	Single power works
	Work temp.	(℃)	-5~65
	Storage temp.	(℃)	-40~85
	Work relative humidity	(%)	5~95
	Size (W)x(D)x(H)		19×14.7×1.75 ( " ) 483×373×44 ( mm )

Ordering Information
FB-CT-ITU-1550-ED-XX-YY	CATV fiber transmitter built-in EDFA, output power XX = 17. 20, 22, 23 dbm, YY - distance i km, 5, 10 or 15 km, ITU band.
FB-CT-1550-ED-XX-YY	CATV fiber transmitter built-in EDFA, output power XX = 17. 20, 22, 23 dbm, YY - distance i km, 5, 10 or 15 km, CATV band.