1550nm External Modulation Optical Transmitter

COL-ET7002A, an economical 1550nm Externally Modulated Optical Transmitter, is produced specially for middle and small CATV station. It adopts narrow bandwidth (Typ.=1MHz), low noise and continuous wave DFB laser as the light source, adopts CATV special LiNbO3 external modulator to modulate signal, and adopts a series of unique innovation technique to reach the excellent system control. With 47~862MHz bandwidth, CNR ≥ 53dB, CTB ≤ -65dB, CSO ≤ -65dB, SBS: 13, 16, 18adjustable, COL-ET7002A can make CATV network transmit video, audio and data with high performance. The machine is equipped with perfect RS232 communication interface, SNMP network management and 1+1 backup power supply.

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Product Detail

Product Tags

Key Features

✔ High performance: Externally modulated technology, no laser chirp, low dispersion distortion, high extinction ratio, with excellent characteristic within 40~862MHz in-band.

✔ Narrow bandwidth (Typ.=1MHz), lower noise, DFB continuous wave laser.

✔ The operating bandwidth is up to 47~1080MHz.

✔ Perfect index: Unique innovation technology, provide excellent CNR, CTB, CSO & SBS.

✔ ITU standard wavelength adjustable, the user can adjust and set the laser wavelength on the front-panel with ±0.05nm stepping in the range of ±200GHz (±1.6nm), used in the network upgrading and expansion of WDM system.

✔ AGC/MGC mode is optional at spot. OMI can be optimized at spot.

✔ Perfect RS232 communication interface.

✔ SNMP network management function optional.

✔ 1+1 backup power supply optional.

✔ Casing temperature auto-control.

✔ Excellent P/P rat

Technical specification

Performance			Index		Supplement
Optic feature	Operating wavelength	(nm)	1540~1563		WT8500AC
			ITU-TG.692		WT8500AU
	Wavelength ADJ. range	(nm)	±1.6 (±200GHz)		WT8500AU
	Wavelength ADJ. mode		±0.05nm stepping		WT8500AU
	Line width	(MHz)	≤1.0		FWHM(Δλ)
	Side mode suppression ratio	(dB)	≥45		SMSR
	Equivalent noise intensity	(dB/Hz)	≤-160		RIN (20~1000MHz)
	Output power	(dBm)	2×5		Optional 2×3, 2×6, 2×7, 2×9
	Return loss	(dB)	≥60
	optical fiber connector		SC/APC		Optional LC/APC,FC/APC
RF feature	Work bandwidth	(MHz)	47-862		47~1000,47~1080 optional
	Input level	(dBmV)	18~28		AGC
	Flatness	(dB)	≤±0.75		47~862MHz
			≤±1.5		862~1000MHz (Optional)
	Return loss	(dB)	>16
	Input impedance	(Ω)	75
	RF 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	≥50.0	65Km optical fiber, 0dBm receive
	CTB	(dB)	≤-65	≤-65
	CSO	(dB)	≤-65	≤-65
	SBS restrain	(dBm)	13, 16, 181		Adjustable
General feature	SNMP network management interface		RJ45
	Communication interface		RS232
	Power supply	(VAC)	90~265VAC		50/60Hz
\		(VDC)	-48		30~72
	Power Consume	(W)	≤50		Single power works
	Work temp.	(°C)	0~50		Machine temp. control automatically
	Storage temp.	(°C)	-40~85
	Operating relative humidity	(%)	5~95
	Size	(")	19×14.5×1.75		(W)x(D)x(H)

Product series

Model	Output Power(dBm)	Operating wavelength (nm)	SBS Restrain(dBm)	System index(59 routes PAL-D)
				CNR1	CNR2	CTB	CSO
1550-2*3	Dual fiber 2×3	1540~1563	13, 16, 18 Adjustable	≥53	≥50.5	≤-65	≤-65
1550-2*5	Dual fiber 2×5			≥53	≥51	≤-65	≤-65
1550-2*6	Dual fiber 2×6			≥53	≥51.5	≤-65	≤-65
1550-2*7	Dual fiber 2×7			≥53	≥51.5	≤-65	≤-65
1550-2*8.5	Dual fiber 2×8.5			≥53	≥51.5	≤-65	≤-65
1550-2*3	Dual fiber 2×3	1528~1563nm ITU wavelength ADJ.		≥53	≥50.5	≤-65	≤-65
1550-2*5	Dual fiber 2×5			≥53	≥51	≤-65	≤-65
1550-2*6	Dual fiber 2×6			≥53	≥51.5	≤-65	≤-65
1550-2*7	Dual fiber 2×7			≥53	≥51.5	≤-65	≤-65
1550-2*8.5	Dual fiber 2×8.5			≥53	≥51.5	≤-65	≤-65

Application

A.Used in middle and small CATV center head end, solve the transmission of trunk and distributive network with high quality and low cost.

B.Used in second-grade service area of sub-station. With excellent P/P ratio, provide second-grade users with high quality and high reliability value added service such as RFTV, IPTV, VOD and so on. It can avoid the limitation on transmission bandwidth and distance as well as system CSO deterioration caused by laser chirp for adopting 1550nm direction modulated optical transmitter

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1550nm External Modulation Optical Transmitter