Optical transceiver and method of controlling optical output jitter using the same

A method of controlling optical output jitter using an optical transceiver that includes a transmitter unit having an equalizing (EQ) filter which can reduce jitter of a high speed electric signal, a control circuit which controls the EQ filter, a receiver unit which receives an optical signal, and a micro-controller which controls the transmitter unit and the receiver unit, the optical transceiver being an XFP transceiver (10 Gb/s small form-factor pluggable) or a 300-pin Multi-Source Agreement (MSA) transceiver, said method comprising:

• reducing jitter of a high speed electric signal, wherein when the optical transceiver is a XFP transceiver (10 Gb/s Small Form-factor Pluggable), the transmitter unit comprises a Clock and Data Recovery (CDR) unit, a Laser Diode (LD) driver, and a Transmitter Optical Sub-Assembly (TOSA), and the EQ filter is interposed between the CDR unit and the LD driver, and when the optical transceiver is a 300-pin Multi-Source Agreement (MSA) transceiver, the transmitter unit comprises a serializer, the LD driver, and a Laser Diode (LD) module, and the EQ filter is interposed between the serializer and the LD driver,
• wherein the EQ filter comprises:
• a receiver which receives an electric signal from the CDR unit or the serializer;
• an output driver which directly receives the signal outputted from the receiver;
• and
• a pre-emphasis driver which receives the signal outputted from the receiver through a delay device, and
• wherein the optical transceiver comprises a filter control circuit that is connected to the micro-controller to control the EQ filter and the EQ filter amplifies high-frequency component, thereby reducing optical output jitter.

An optical transceiver comprising

• a receiver unit that receives input optical signals and generates electrical signals corresponding to the input optical signals, and
• a transmitter unit that includes an input unit that receives the electrical signals generated by the receiver unit, a passive high pass equalizing (EQ) filter that receives output signals of the input unit, and means connected to the EQ filter for generating an output optical signal that corresponds to the input optical signal.
• wherein the input unit of the transmitter unit is selected from the group consisting of a clock and data recovery (CDR) unit and a serializer, and
• wherein the EQ filter comprises a lumped RLC device.