Optoelectronic devices with intelligent transmitter modules
View Patent ↗An optoelectronic device can implement an intelligent transmitter module (“ITM”), rather than a conventional TOSA, for the transmission of optical data signals. The ITM can include an optical transmitter, a CDR and driver IC, and a microcontroller and/or linear amplifier. Space available in the optoelectronic device due to using an ITM rather than a TOSA and PCB-bound CDR, driver, microcontroller, and/or linear amplifier can be used for the inclusion of one or more electronic and/or optical components. Electronic components that can be included in a device with an ITM include: an FPGA, a DSP, a memory chip, a digital diagnostic IC, a video IC, a wireless interface, and an RF interface. Optical components that can be included in a device with an ITM include: a VOA, an SOA, a MUX, a DEMUX, a polarization controller, and an optical power monitoring device.
1. An optoelectronic device having one or more optical components and one or more electrical components, the device comprising:
a device housing surrounding:
an intelligent transmitter module including:
a clock and data recovery circuit for receiving, equalizing, and retiming an electrical data signal;
a driver operably connected to the clock and data recovery circuit and configured to generate a modulation signal from the electrical data signal;
a laser operably connected to the driver and configured to emit an optical data signal representative of the electrical data signal; and
one or both of:
a linear amplifier operably connected between the driver and the laser, the linear amplifier configured to receive and amplify the modulation signal; and
a microcontroller configured to control operation of the intelligent transmitter module,
wherein the clock and data recovery circuit, the driver, and the linear amplifier are integrated into an integrated package;
a printed circuit board positioned outside the integrated package and operably connected to the intelligent transmitter module for carrying the electrical data signal to the intelligent transmitter module; and
coupled to the printed circuit board, one or more of: a field programmable gate array for performing one or more programmable functions in the optoelectronic device; a digital signal processor for processing the electrical data signal; a memory chip; a video integrated circuit; a wireless interface for receiving a wireless data signal and generating the electrical data signal therefrom; a radio frequency interface for receiving a radio frequency data signal and generating the electrical data signal therefrom; a variable optical attenuator operably coupled to an optical output of the intelligent transmitter module for reducing a power of the emitted optical data signal; a semiconductor optical amplifier operably coupled to the optical output of the intelligent transmitter module for increasing the power of the emitted optical data signal; a polarization controller configured to control the polarization of the emitted optical data signal; and an optical power monitoring device configured to monitor the power of the emitted optical data signal,
the optoelectronic device configured to comply with a size and power limitations of a standardized form factor or a telecommunication standard.
2. The optoelectronic device of claim 1 , wherein the intelligent transmitter module is configured for transmitting optical signals distances exceeding 100 kilometers.
3. The optoelectronic device of claim 1 , wherein the clock and data recovery circuit is optimized in a low-noise environment.
4. The optoelectronic device of claim 1 , further comprising:
a plurality of intelligent transmitter modules, and
an optical multiplexer operably connected to an optical output of each of the plurality of intelligent transmitter modules and configured to multiplex a plurality of optical data signals received from the plurality of intelligent transmitter modules into a multiplexed optical data signal.
5. The optoelectronic device of claim 1 , further comprising a digital diagnostic integrated circuit coupled to the printed circuit board and configured to generate monitoring and operating data for the optoelectronic device.
6. The optoelectronic device of claim 1 , wherein the integrated package includes a faraday cage.
7. The optoelectronic device of claim 1 , further comprising a thermal chirp compensation circuit coupled between the laser and the clock and data recover circuit.
8. An optoelectronic device comprising:
an intelligent transmitter module for receiving a first electrical signal and emitting an optical signal representative of the first electrical signal including:
a first substrate having bonded thereto a first integrated circuit, a thermal chirp compensation circuit, and a linear amplifier integrated circuit, the first integrated circuit including an equalization and retiming stage optimized in a low-noise environment and a driver stage; and
a second substrate, substantially distinct from the first substrate, having manufactured thereon an optical signal source with managed chirp, wherein the optical signal source is operably connected to the linear amplifier integrated circuit,
wherein the first substrate, the first integrated circuit, the linear amplifier integrated circuit, the second substrate, and the optical signal source are integrated into a faraday cage;
a receiver optical subassembly positioned outside of the integrated package for receiving an optical signal and converting the optical signal to a second electrical signal; and
a printed circuit board operably connected to the intelligent transmitter module and the receiver optical subassembly and configured to carry the first electrical signal from a host to the intelligent transmitter module and to carry the second electrical signal from the receiver optical subassembly to the host, wherein the printed circuit board includes thereon a post amplifier for amplifying the second electrical signal.
9. The optoelectronic device of claim 8 , further comprising one or more of:
a field programmable gate array coupled to the printed circuit board and configured to be programmed by a user or manufacturer of the optoelectronic device;
a memory chip coupled to the printed circuit board for storing one or more of: microcode, information identifying the optoelectronic device, and operational settings of the optoelectronic device;
a polarization controller coupled to an optical output of the intelligent transmitter module, the polarization controller configured for one or more of:
polarization mode dispersion compensation, polarization scrambling, polarization multiplexing, and a polarization generator;
a photodetector for monitoring the optical power output of the intelligent transmitter module; and
a variable optical attenuator coupled to the optical output of the intelligent transmitter module for adjustably attenuating the emitted optical signal, wherein the variable optical attenuator comprises a mechanical variable optical attenuator or a non-mechanical variable optical attenuator.
10. The optoelectronic device of claim 9 , wherein:
the integrated package is positioned adjacent to the printed circuit board, and
the field programmable gate array, the memory chip, and a first semiconductor optical amplifier are included on the printed circuit board.
11. The optoelectronic device of claim 8 , further comprising a digital diagnostic integrated circuit coupled to the printed circuit board, wherein the digital diagnostic integrated circuit facilitates one or more of the following functions for the optoelectronic device: device setup, device identification, eye safety and general fault detection, temperature compensation, monitoring of parameters relating to the optoelectronic device operating characteristics and environment, tracking an amount of time the optoelectronic device is powered on, and margining.
12. The optoelectronic device of claim 8 , further comprising a video integrated circuit coupled to the printed circuit board and configured to process a video signal for transmission as an optical signal by the intelligent transmitter module, or to process a video signal received as an optical signal by the receiver optical subassembly, or any combination thereof, wherein the video integrated circuit comprises one or more of: a video decoder, a video encoder, a video noise-reduction FIFO, an LCD graphic display controller, a video FIFO, a video amplifier, and a video filter.
13. The optoelectronic device of claim 8 , further comprising a wireless interface coupled to the printed circuit board for:
receiving a first wireless signal and generating the first electrical signal, wherein the first electrical signal is representative of the first wireless signal; and
receiving the second electrical signal and emitting a second wireless signal representative of the second electrical signal.
14. The optoelectronic device of claim 8 , further comprising a radio frequency interface for:
receiving a first radio frequency signal and generating the first electrical signal, wherein the first electrical signal is representative of the first radio frequency signal; and
receiving the second electrical signal and generating a second radio frequency signal representative of the second electrical signal.
15. The optoelectronic device of claim 8 , further comprising:
a first semiconductor optical amplifier coupled to the intelligent transmitter module and configured to boost the emitted optical signal; and
a second semiconductor optical amplifier coupled to the receiver optical subassembly and configured to pre-amplify the received optical signal.
16. The optoelectronic device of claim 8 , wherein the intelligent transmitter module is configured for transmitting optical signals distances exceeding 100 kilometers.
17. The optoelectronic device of claim 8 , wherein a clock and data recovery circuit included in the intelligent transmitter module is optimized in a low-noise environment.
18. The optoelectronic device of claim 8 , further comprising:
a plurality of intelligent transmitter modules, and
an optical multiplexer operably connected to an optical output of each of the plurality of intelligent transmitter modules and configured to multiplex a plurality of optical data signals received from the plurality of intelligent transmitter modules into a multiplexed optical data signal.
19. The optoelectronic device of claim 8 , wherein the optoelectronic device is configured to comply with a size and power limitation of a standardized form factor or a telecommunication standard.