VCSEL based optical links in burst mode
First Claim
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1. A method for optical communications, comprising:
- in an optical communication device comprising a transmitter including a light-emitting device, applying a bias current to the light-emitting device; and
transmitting a pulse as an input to the light-emitting device before transmitting a preamble signal or data signal to the light-emitting device, wherein the pulse has a voltage equal to or greater than a highest voltage of the preamble signal or data signal;
wherein a time for an optical output of the light-emitting device to reach full amplitude when the pulse is transmitted is reduced compared to a time for an optical output of the light-emitting device to reach full amplitude when the pulse is not transmitted.
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Abstract
Devices and methods are provided to reduce the wake-up time of a Vertical Cavity Surface Emitting Laser (VCSEL) used in a data communication link. For example, in one aspect, a method for optical communications includes, in an optical communication device including a light-emitting device, applying a bias current to the light-emitting device and transmitting a pulse to the light-emitting device before transmitting a preamble signal or data signal to the light-emitting device, wherein the pulse has a voltage greater than a highest voltage of the preamble signal or data signal.
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Citations
23 Claims
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1. A method for optical communications, comprising:
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in an optical communication device comprising a transmitter including a light-emitting device, applying a bias current to the light-emitting device; and transmitting a pulse as an input to the light-emitting device before transmitting a preamble signal or data signal to the light-emitting device, wherein the pulse has a voltage equal to or greater than a highest voltage of the preamble signal or data signal; wherein a time for an optical output of the light-emitting device to reach full amplitude when the pulse is transmitted is reduced compared to a time for an optical output of the light-emitting device to reach full amplitude when the pulse is not transmitted. - View Dependent Claims (2, 3, 4, 7, 8, 9, 10)
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5. A method for optical communications, comprising:
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in an optical communication device comprising a transmitter including a light-emitting device, applying a bias current to the light-emitting device; and transmitting a pulse as an input to the light-emitting device before transmitting a preamble signal or data signal to the light-emitting device, wherein the pulse has a voltage equal to or greater than a highest voltage of the preamble signal or data signal; wherein an optical output of the light-emitting device is coupled to a receiver, and a time for an optical output of the light-emitting device to reach an amplitude at which the receiver can sync to the optical output of the light-emitting device when the pulse is transmitted is reduced compared to a time for the optical output of the light-emitting device to reach an amplitude at which the receiver can sync to the optical output of the light-emitting device when the pulse is not transmitted. - View Dependent Claims (6)
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11. An optical transmitter device, comprising:
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a light-emitting device; a bias current source adapted to apply a bias current to the light-emitting device; and a pulse generator adapted to generate and transmit a pulse as an input to the light-emitting device before a preamble signal or data signal is transmitted to the light-emitting device, wherein the pulse has a voltage equal to or greater than a highest voltage of the preamble signal or data signal; wherein the bias current in the optical transmitter device in which the pulse is transmitted is reduced compared to a bias current that is applied in an optical communication device in which the pulse is not transmitted. - View Dependent Claims (12, 13, 18, 19, 20)
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14. An optical communication device, comprising:
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a light-emitting device; a bias current source adapted to apply a bias current to the light-emitting device; and a pulse generator adapted to generate and transmit a pulse to the light-emitting device before a preamble signal or data signal is transmitted to the light-emitting device, wherein the pulse has a voltage equal to or greater than a highest voltage of the preamble signal or data signal; and wherein a time for an optical output of the light-emitting device to reach full amplitude when the pulse is transmitted is reduced compared to a time for an optical output of the light-emitting device to reach full amplitude when the pulse is not transmitted. - View Dependent Claims (15, 16, 17)
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21. A computer program product for performing optical communication, the computer program product comprising a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer, to cause the computer to perform a method comprising:
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in an optical communication device comprising a transmitter including a light-emitting device and a bias circuit, applying a bias current to the light-emitting device; and transmitting a pulse as an input to the light-emitting device before transmitting a preamble signal or data signal to the light-emitting device, wherein the pulse has a voltage equal to or greater than a highest voltage of the preamble signal or data signal; wherein a time for an optical output of the light-emitting device to reach full amplitude when the pulse is transmitted is reduced compared to a time for an optical output of the light-emitting device to reach full amplitude when the pulse is not transmitted. - View Dependent Claims (22, 23)
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Specification