CWDM SFP(Coarse Wavelength Division Multiplexing) transceiver, used on SFP ports or slots on the switches or routers, is a technology that allows for multiple channels, of mixed protocols and data rates, to be COMBINED and transmitted over fiber optic cable.

CWDM SFP makes use of the SFP interface to connect the apparatus and also double LC/PC fiber connector software to connect the optical network. CWDM SFP are used to link the ports to the fiber optic network, typical CWDM SFP like Cisco’s could support both Gigabit Ethernet and Fiber Channel. It is compatible with Fast Ethernet, SONET OC-3 and OC-12, and SDH STM-1 and STM-4 standards.

Basical Features of CWDM SFP transceiver
Hot-Pluggable, Dual LC port;
Class 1 Laser safety, compliant with IEC60825-1;
Transmitter center wavelength:
1270nm,1290nm,1310nm,1330nm,1350nm,1370nm,1390nm,1410nm,1430nm,1450nm,1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm and 1610nm;
Receiver PIN or APD;
Single +3.3V power supply, PECL data interface;
Operating temperature range: -5 to +70 degrees;
Supports DDMI function;
Compliant with RoHS standard;
Compatible with Telcordia (bellcore) GR-468-CORE requirement;
Data speed from 155M to 2.5Gbps;

Structure of CWDM SFP transceiver
The CWDM SFP transceiver consists of three sections: a uncooled CWDM DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit.

The transceiver integrates the receive and transmit path on one module. On the transmit side, the serial data stream is passed to a laser driver. The laser driver biases and modulates an uncooled direct modulated laser (DML), enabling data transmission over single-mode fiber through an industry-standard LC connector. On the receive side, the optical data stream is recovered from a PIN or avalanche photodetector (APD), sent to a transimpedance amplifier, and then passed to a post amplifier. This module features a hot-pluggable SFI-compliant electrical interface.

This integrated fiber optic transceiver provides a high-speed serial link at signaling rates from 100 Mbps to 3.1 Gbps. The module complies with the small form factor pluggable (SFP) multisource agreement (MSA).

Types of CWDM SFP transceiver
Typical CWDM SFP transceiver include CWDM SFP 1470, CWDM SFP 1490,CWDM SFP 1510,CWDM SFP 1530,CWDM SFP 1550, CWDM SFP 1570, CWDM SFP 1590,CWDM SFP 1610.

Brands of CWDM SFP transceiver

Where previously additional fiber needed to be run, now existing strands can be more fully utilized, reducing fiber plant expenditures as bandwidth needs increase.

Cisco CWDM SFP is a series of single mode transceiver cover from 1470 to 1610nm wavelength applications, they are different colors to identify them, these CWDM SFP are used for Gigabit Ethernet and 1/2Gbps Fibre Channel applications.

Juniper CWDM SFP, including SFP-1GE-LH-CWDM-1270, SFP-1GE-LH-CWDM-1290, SFP-1GE-LH-CWDM-1310, SFP-1GE-LH-CWDM-1330, SFP-1GE-LH-CWDM-1350. The Juniper CWDM SFP transceivers are with excellent quality.

Foundry CWDM SFP transceiver works at 80KM and with different working wavelength from 1470nm to 1610nm. It is fully compatible and functional in its intended Foundry router or switch and complete MSA compliant.

Cisco’s may possibly aim at either Gigabit Ethernet or Fiber Channel. Ingellen supply original CWDM SFP together with other impressive companies CWDM SFP transceiver, just like Cisco, HP, Huawei, plus Juniper and so on. Ingellen, as a famousfiber optic manufacturer, offers many other kinds of fiber optic transceiver like SFP Transceiver, GBIC Transceiver, CWDM SFP Transceiver, DWDM SFP Transceivers, SGMII SFP Transceiver, SFP+ Transceiver, XFP Transceiver, X2 Transceivers, Xenpak Transceiver and more.

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