Dual laser driver architecture in an optical transceiver
View Patent ↗Embodiments disclosed herein relate to a dual laser driver architecture configured to be implemented on a single IC chip. The dual laser driver architecture includes at least a first laser driver stage configured to drive a first laser with a first current and a second laser driver stage configured to drive a second laser with a second current that is less than the first current. Embodiments also relate to an optical transceiver that implements the dual laser driver architecture.
1. A dual laser driver architecture configured to be implemented on a single IC chip comprising at least:
a first laser driver stage, the first laser driver stage being configured to drive a first laser with a first current; and
a second laser driver stage, the second laser stage being configured to drive a second laser with a second current that is less than the first current, wherein the first laser driver stage is an active match laser driver and the second laser driver stage is a CML laser driver.
2. The dual laser driver architecture in accordance with claim 1 , wherein the first laser is one of a DFB laser, FP laser, or VCSEL laser.
3. The dual laser driver architecture in accordance with claim 1 , wherein the second laser is a VCSEL.
4. The dual laser driver architecture in accordance with claim 1 , wherein the first current is approximately 80 mA and the second current is approximately 14 mA.
5. The dual laser driver architecture in accordance with claim 1 , wherein the first and second laser driver stages include or are coupled to a cross-point adjustment circuit and/or an independent rise/fall time control circuit.
6. The dual laser driver architecture in accordance with claim 1 , wherein the first and second laser driver stages are connected to a signal boost circuit configured to provide a boost to the signal output from the first and second laser driver stages.
7. A dual laser driver architecture configured to be implemented on a single IC chip comprising at least:
a first laser driver stage, the first laser driver stage being configured to drive a first laser with a first current; and
a second laser driver stage, the second laser stage being configured to drive a second laser with a second current that is less than the first current, wherein the first and second laser driver stages are connected to a post-amplifier through a multiplexer stage.
8. The dual laser driver architecture in accordance with claim 1 , wherein implementing the first and second laser driver stages on a single IC chip at least partially reduces EMI emissions.
9. The dual laser driver architecture in accordance with claim 1 , wherein a control module selects which one of the first and second laser driver stages are to be used.
10. An optical transceiver comprising:
a post-amplifier;
an optical receiver coupled to the post-amplifier;
a laser driver comprising at least:
a first laser driver stage, the first laser driver stage being configured to drive a first laser with a first current; and
a second laser driver stage, the second laser stage being configured to drive a second laser with a second current that is less than the first current;
a first electro-optical transducer coupled to the first driver stage;
a second electro-optical transducer coupled to the second driver stage; and
a control module coupled to the post-amplifier and the laser driver.
11. The optical transceiver in accordance with claim 10 , wherein the first electro-optical transducer is one of a DFB laser, FP laser, or VCSEL laser.
12. The optical transceiver in accordance with claim 10 , wherein the second electro-optical transducer is a VCSEL.
13. The optical transceiver in accordance with claim 10 , wherein the first current is approximately 80 mA and the second current is approximately 14 mA.
14. The optical transceiver in accordance with claim 11 , wherein the first laser driver stage is an active match laser driver and the second laser driver stage is a CML laser driver.
15. The optical transceiver in accordance with claim 10 , wherein the first and second laser driver stages include or are coupled to a cross-point adjustment circuit, and/or an independent rise/fall time control circuit, and/or a signal boost circuit configured to provide a boost to the signal output from the first and second laser driver stages.
16. The optical transceiver in accordance with claim 10 , wherein the post-amplifier and the laser driver are implanted on a single IC chip.
17. The optical transceiver in accordance with claim 16 , wherein the first and second laser driver stages are connected to the post-amplifier through a multiplexer stage.
18. The optical transceiver in accordance with claim 10 , wherein implementing the first and second laser driver stages on a single IC chip at least partially reduces EMI emissions.
19. The optical transceiver in accordance with claim 10 , wherein the control module selects which one of the first and second laser driver stages are to be used during operation of the optical transceiver.