Optical networks for consumer electronics

• US 7,729,618 B2
• Filed: 08/29/2006
• Issued: 06/01/2010
• Est. Priority Date: 08/30/2005
• Status: Active Grant

• Current Assignee: II-VI Delaware, Inc. (Coherent Corp.)
• Original Assignee: Finisar Corporation (II-VI Incorporated)
• Inventors: Guenter, James K., Tatum, Jimmy A.
• Primary Examiner(s): Bello; Agustin
• Application Number:
  US11/468,280
• Publication Number:
  US 20070233906A1
• Time in Patent Office: 1,372 Days
• Field of Search: 398135-141, 398/153
• US Class Current: 398/139
• CPC Class Codes: G06F 13/28 using burst mode transfer, e.g. direct memory access DMA, cycle steal G06F13/32 takes precedence
• CPC Class Codes: G09G 2370/12 Use of DVI or HDMI protocol in interfaces along the display data pipeline
• CPC Class Codes: G09G 2380/10 Automotive applications
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092

Abstract

Digital optical networks for communication between digital consumer electronic devices are disclosed. A digital optical network can include an input interface configured to electrically couple to a DVI or HDMI receptacle of a source device. The input interface includes an optical transmitter for converting a TMDS signal into an optical signal. An input optical fiber optically coupled to the optical transmitter receives the optical signal. A coupler is coupled to the input optical fiber and couples the optical signal with at least one of multiple output optical fibers coupled to the coupler. Output interfaces each include an optical transmitter for converting the optical signal back into the electrical TMDS signal. The output interfaces are configured to electrically couple the TMDS signals with respective DVI or HDMI receptacles of DVI or HDMI sink devices.

Claims

1. A digital optical interface device comprising:

a DVI or HDMI input interface configured to electrically connect to a DVI or HDMI receptacle of a digital source device to receive input TMDS electrical signals from the digital source device, the input interface comprising a serializer for serializing the TMDS signals into a electrical serialized signal and an optical transmitter configured to receive the electrical serialized signal and convert the electrical serialized signal to an input optical signal, the optical transmitter further configured to transmit the input optical signal to an input optical fiber;

a coupler configured to couple the input optical signal with at least two optical output fibers coupled to the input optical fiber by the coupler;

wherein each optical output fiber is coupled to a respective output interface, each output interface being configured to electrically connect to a different DVI or HDMI receptacle of two different digital sink devices, each output interface comprising an optical receiver configured to receive the input optical signal from a respective one of the at least two optical output fibers and convert the input optical signal to an output serialized electronic video signal that is received by respective deserializers of the respective output interface, each deserializer deserializing the respective output serialized electronic video signal back into the TMDS electrical signals that are suitable for use by a respective one of the DVI or HDMI digital sink devices, wherein the digital optical interface device is configured to communicate the same signals from the digital source device to at least two digital sink devices.

2. A digital interface device according to claim 1, wherein the coupler is configured to direct different input optical signals to different optical outputs or the coupler is configured to direct the same input optical signal to multiple optical outputs.

3. A digital interface device according to claim 1, wherein:

the input interface is part of an input optical cable;

each output interface is part of an output optical cable; and

the coupler is part of a nexus, the nexus being configured to electrically or optically couple the input optical cable to each of the output optical cables.

4. A digital interface device according to claim 1, wherein at least one of the interfaces comprises means for transmitting and receiving optical signals.

5. A digital optical network comprising:

an input interface configured to electrically couple to a DVI or HDMI receptacle of a DVI or HDMI source device, the input interface including;

an optical transmitter configured to convert electrical transition minimized differential signaling (TMDS) signals and a control signal received from the DVI or HDMI source device into an optical signal;

a serializer for serializing the electrical TMDS signal along with the control signal into an electrical serialized TMDS signal;

an input optical fiber optically coupled to the optical transmitter to receive the optical signal;

a coupler configured to couple the optical signal with at least two of multiple output optical fibers coupled to the coupler; and

at least two output interfaces, each of the at least two output interfaces being configured to electrically couple to a respective DVI or HDMI receptacle of at least two DVI or HDMI sink devices, each of the at least two output interfaces including;

an optical receiver configured to receive and convert the optical signal back into the electrical TMDS signal; and

a deserializer for deserializing the electrical serialized TMDS signal back into the electrical TMDS signals and control signal and configured to transmit the electrical TMDS signals and control signal to a respective one of the DVI or HDMI sink devices, wherein the digital optical network is configured to transmit all of the signals generated by the DVI or HDMI source device to both of the DVI or HDMI sink devices via optical transmission.

6. A digital optical network according to claim 5, wherein the coupler is an electronic coupler and the optical signal is converted back to an electrical signal by an optical receiver before it is converted to an optical signal by an optical transmitter and coupled to the at least one of multiple output optical fibers.

7. A digital optical network according to claim 6, wherein the optical signal is converted to an electrical signal prior to being received by the electronic coupler, and wherein the electronic coupler couples the electrical signal to multiple optical transmitters which convert the electrical signal to multiple optical signals and transmit the multiple optical signals to multiple output fibers.

8. A digital optical network according to claim 5, wherein the coupler is a part of a nexus configured to couple the input optical fiber with the at least one of multiple output optical fibers.

9. A digital optical network according to claim 8, wherein the nexus is further configured to convert optical signals received from the input optical fiber into electrical signals, split the electrical signal into at least two electrical signals, and couple the electrical signals to the at least two output interfaces.

10. A digital optical network according to claim 8, wherein the nexus is further configured to convert the electrical signals to optical signals and couple the optical signals to the output interfaces.

11. A digital optical network according to claim 5, wherein at least one of the input interface and/or one of the second interfaces includes:

a VCSEL;

a monitor optical receiver for monitoring the output of the VCSEL;

a modulation laser driver configured to modulate a bias drive current supplied to the VCSEL; and

a TO-Can package encasing the VCSEL, the monitor optical receiver, and the modulation laser driver.

12. A digital optical network according to claim 5, wherein the optical network transmits signals in both a first direction and a second direction across the input optical fiber, the second direction being opposite to the first direction, wherein:

the input interface is configured to couple the input optical fiber for bidirectional communication to the DVI or HDMI source device; and

the second interfaces are configured to couple the optical network for bidirectional communication with the DVI or HDMI sink devices.

13. A digital optical network according to claim 12, wherein at least one of, or any combination of, the input interface and the second interfaces includes an optoelectronic device for detecting an incoming light beam along a light beam axis and for transmitting an outgoing light beam along the light beam axis, the optoelectronic device including:

an optical detector positioned along the light beam axis for receiving the incoming light beam and for detecting a first wavelength and/or range of wavelengths; and

the optical transmitter positioned along the light beam axis for transmitting the outgoing light beam, wherein the outgoing light beam includes a second wavelength and/or range of wavelengths.

14. A digital optical network according to claim 12, wherein the input interface further includes:

a first transmit optical subassembly (TOSA) configured to convert the electrical serialized signal into an optical signal, and transmit the optical serialized signal onto the first end of the input optical fiber;

a first receive optical subassembly (ROSA) configured to receive a return optical signal from the input optical fiber; and

wherein the second interfaces further include;

second ROSAs configured to receive the optical signal from second ends of the output optical fibers, and convert the optical signal into the electrical serialized signal;

second TOSAs configured to transmit the return optical signal to the output optical fibers.

15. A digital optical network according to claim 12, wherein at least one of the interfaces includes a bidirectional optical device comprising:

an optical port;

a wavelength splitter proximate to the optical port;

a light source proximate to the wavelength splitter; and

a detector proximate to the wavelength splitter,

wherein;

the wavelength splitter passes light having a first wavelength from the light source to the optical port; and

the wavelength splitter reflects light having a second wavelength from the optical port to the detector.

16. A digital optical network according to claim 5, wherein at least one of the input and/or output interfaces includes means for transmitting and receiving optical signals.

17. A digital electro-optical system configured to allow a digital source device to communicate with at least two digital sink devices, comprising:

an input interface including electrical contacts configured to receive electrical TMDS and control signals generated by the digital source device, the electrical input interface including a serializer configured to serialize the TMDS and control signals into a serialized electrical signal, and an optical transmitter configured to convert the serialized electrical signal to an optical signal;

an optical input fiber optically coupled to the optical transmitter and configured to receive the optical signal;

a coupler coupled to the input optical fiber and coupled to at least two output optical fibers for transferring the optical signal from the input optical fiber to the at least two output optical fibers;

a first output interface including a first optical receiver optically coupled to a first output optical fiber of the at least two output optical fibers and configured to convert the optical signal received from the first optical fiber to a first copy of the serialized electrical signal, the first output interface further including a first deserializer configured to deserialize the first copy of the serialized electrical signal into a first copy of the TMDS and control input signals, the first output interface further including electrical contacts configured to transmit the first copy of the electrical TMDS and control signals to a first digital sink device of the at least two digital sink devices; and

a second output interface including a second optical receiver optical coupled to a second output optical fiber of the at least two output optical fibers and configured to convert the optical signal received from the second optical fiber to a second copy of the serialized electrical output signal, the second output interface further including a second deserializer configured to deserialize the second copy of the serialized electrical signal into a second copy of the TMDS and control input signals, the second output interface farther including electrical contacts configured to transmit the second copy of the electrical output signals to a second digital sink device of the at least two digital sink devices, wherein at least one of the interfaces includes an optoelectronic device including;

a transmitter diode including a first p-n junction with a first p-layer and a first n-layer;

a first tunnel junction coupled monolithically to the transmitter diode, the tunnel junction including a heavily doped n+ layer and a heavily doped p+ layer; and

a first photodiode coupled monolithically to the first tunnel junction, the first tunnel junction including a second p-n junction.

18. A cable according to claim 17, wherein the coupler is configured to optically couple the input optical signal received from the optical input fiber to both output optical fibers.

19. A cable according to claim 18, wherein the coupler is configured to electrically couple the input optical signal received from the optical input fiber to the at least two output optical fibers by converting the input optical signal back into the serialized electrical signal and transmitting the serialized electrical signal to at least two outputs of the coupler where the at least two copies of the serialized electrical signal are converted into at least two optical signals and transmitted respectively to the at least two output optical fibers.