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US 2023/0144071 A1Published application
Burstmode optical transmitter
AssigneeElectronics and Telecommunications Research Institute
InventorsHan Hyub LEE, Hwan Seok CHUNG
Life of this patent
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Abstract
Provided is a burst mode optical transmitter capable of preventing an optical signal from being output from a light source during burst mode disable time through an arithmetic circuit configured to remove an idle signal included in a MAC electrical signal by using a MAC electrical signal and a burst mode control signal.
Claims13
A burst mode optical transmitter comprising:
- a clock and data recovery circuit configured to receive a media access control (MAC) electrical signal including a valid data signal and an idle signal from MAC of an optical network unit (ONU) according to a burst mode control signal;
- an arithmetic circuit configured to remove the idle signal included in the MAC electrical signal by using the burst mode control signal and the MAC electrical signal in which clock and data are recovered through the clock and data recovery circuit;
- a modulation voltage output circuit configured to output an electrical signal including a modulation voltage and a bias voltage required for modulation of a light source including a laser diode by using the MAC electrical signal from which the idle signal is removed;
- and
- a bias voltage supply circuit configured to provide operating power for the light source to output an optical signal based on the electrical signal output through the modulation voltage output circuit.
2 more elements
A burst mode optical transmitter comprising:
- a clock and data recovery circuit configured to receive a media access control (MAC) electrical signal including a valid data signal and an idle signal from MAC of an optical network unit (ONU) according to a burst model control signal;
- an arithmetic circuit configured to remove the idle signal included in the MAC electrical signal by using the burst mode control signal and the MAC electrical signal in which the clock and data are recovered through the clock and data recovery circuit;
- a modulation voltage output circuit configured to output an electrical signal required for modulation of a light source by using the MAC electrical signal from which the idle signal is removed;
- and
- a burst mode current control circuit configured to control output of the light source by adjusting a voltage across both ends of the light source based on the burst mode control signal,
- wherein it is determined whether or not the modulation voltage output circuit operates according to the burst mode control signal.
3 more elements
A burst mode optical transmitter comprising:
- a clock and data recovery circuit configured to receive a media access control (MAC) electrical signal including a valid data signal and an idle signal from MAC of an optical network unit (ONU) according to a burst mode control signal;
- an arithmetic circuit configured to remove the idle signal included in the MAC electrical signal by using the burst mode control signal and the MAC electrical signal in which clock and data are recovered through the clock and data recovery circuit;
- a modulation voltage output circuit configured to output an electrical signal required for modulation of a light source by using the MAC electrical signal from which the idle signal is removed;
- a bias voltage supply circuit configured to provide operating power for the light source to output an optical signal based on the electrical signal output through the modulation voltage output circuit;
- and
- a burst mode current control circuit configured to control output of the light source by adjusting a voltage across both ends of the light source based on the burst mode control signal,
- wherein the arithmetic circuit comprises an AND gate configured to provide High output only when the input of the MAC electrical signal and the burst mode control signal are both High, and
- it is determined whether or not the modulation voltage output circuit operates according to the burst mode control signal.
5 more elements
Dependencies are inferred from the claim text.