Electro-optic transceiver module with wavelength compensation

A method of transmitting multiple optical signals at different wavelengths over a single optical fiber, the method comprising:

• using a plurality of vertical-cavity surface-emitting lasers (VCSELs) to convert a plurality of electrical signals to corresponding optical signals, wherein each electrical signal is provided to a respective VCSEL via a corresponding VCSEL driver, and wherein each optical signal has a wavelength that is different from a wavelength of every other optical signal of the plurality of VSCELs;
• receiving at an optical multiplexer the optical signals from the plurality of VCSELs;
• combining, via the optical multiplexer, the optical signals into a single combined optical signal comprising multiple wavelengths;
• transmitting the single combined optical signal through a single optical fiber;
• monitoring a temperature of each VCSEL of the plurality of VCSELs;
• correlating the monitored temperature of each VCSEL to an actual wavelength of the corresponding optical signal transmitted by each respective VCSEL;
• determining an adjustment in a current supplied by the VCSEL driver to each respective VCSEL for which the actual wavelength of the optical signal transmitted is outside a tolerated band of desired wavelengths;
• and
• independently communicating the adjustment to each corresponding VCSEL driver wherein the adjustment to the at least one VCSEL driver maintains the single combined optical signal within a tolerated band of desired multiplex wavelengths.

A method of manufacturing an electro-optic transceiver module comprising:

• providing a plurality of vertical-cavity surface-emitting lasers (VCSELs), wherein each VCSEL is configured to convert an electrical signal to a corresponding optical signal for transmission through a fiber optic cable;
• connecting at least one VCSEL driver to the plurality of VCSELs, wherein the at least one VCSEL driver comprises driving circuitry and is configured to control operation of a corresponding VCSEL of the plurality of VCSELs such that each optical signal has a wavelength that is different from a wavelength of every other optical signal of the plurality of VSCELs;
• coupling an optical multiplexer to the plurality of VCSELs, wherein the optical multiplexer is configured to:
• receive a plurality of optical signals from the plurality of VCSELs,
• combine the plurality of optical signals into a single combined optical signal comprising multiple wavelengths, and
• transmit the single combined optical signal through a single optical fiber;
• and
• connecting a microcontroller to the at least one VCSEL driver, wherein the microcontroller is configured to independently monitor a temperature of each VCSEL, correlate the monitored temperature of each VCSEL to an actual wavelength of the corresponding optical signal transmitted by each respective VCSEL, determine an adjustment in a current supplied by the at least one VCSEL driver to each respective VCSEL for which the actual wavelength of the optical signal transmitted is outside a tolerated band of desired wavelengths, and communicate the adjustment to the at least one VCSEL driver, wherein the adjustment to the at least one VCSEL driver maintains the single combined optical signal within a tolerated band of desired multiplex wavelengths.