Optical transceiver module
View Patent ↗Provided is an optical transceiver module of an optical transceiver, which is used for optical communications. The optical transceiver module prevents electrical crosstalk between a light source and a light receiver. Additionally, the optical transceiver module includes an optical transceiver unit including a light source and a light receiver together integrated into a substrate, a circuit unit including a drive circuit driving the light source and a detect circuit reading a signal of the light receiver, and a crosstalk prevention unit connected between the substrate and ground to prevent electrical crosstalk between the light source and the light receiver.
1. An optical transceiver module, comprising:
an optical transceiver unit including a light source and a light receiver together integrated into a substrate;
a circuit unit including a drive circuit driving the light source and a detection circuit reading a signal of the light receiver; and
a crosstalk prevention unit connected between the light source and the light receiver of the optical transceiver unit integrated in the substrate and ground for preventing electrical crosstalk between the light source and the light receiver.
2. The optical transceiver module of claim 1 , wherein the crosstalk prevention unit applies a reverse bias voltage to the light receiver.
3. The optical transceiver module of claim 1 , wherein the crosstalk prevention unit is a capacitor.
4. The optical transceiver module of claim 1 , wherein the crosstalk prevention unit comprises a capacitor and a resistor respectively connected between the substrate and the ground.
5. The optical transceiver module of claim 4 , wherein the circuit unit includes, in association with an absorber, monitoring light emitted from the light source, and a current supplied to the light source is controlled through feedback by the controller.
6. The optical transceiver module of claim 1 , wherein the crosstalk prevention unit comprises a capacitor and a transistor respectively connected between the substrate and the ground.
7. The optical transceiver module of claim 6 , wherein the circuit unit further includes a controller, in association with an absorber, monitoring light emitted from a light controller, and an on-off state of the transistor is controlled through the controller.
8. The optical transceiver module of claim 6 , wherein the transistor is a MOS (metal oxide semiconductor) transistor and a resistor is placed between a gate of the MOS transistor and the ground.
9. The optical transceiver module of claim 6 , wherein the drive circuit includes a differential pair circuit driving the light source, and the transistor is used as a current source of the differential pair circuit.
10. The optical transceiver module of claim 3 , wherein the capacitor has a capacitance of 1 pF or higher.
11. The optical transceiver module of claim 1 , wherein the optical transceiver comprises an absorber between the light source and the light receiver.
12. The optical transceiver module of claim 1 , wherein the light source is operated according to a current supply method and the light receiver is operated by a reverse bias voltage.
13. The optical transceiver module of claim 1 , wherein the light source is a laser diode and the light receiver is a photo-detector.
14. The optical transceiver module of claim 1 , wherein the substrate is an n-type semiconductor or a p-type semiconductor.