OPTICAL TRANSMITTERS FOR MM-WAVE ROF SYSTEMS
First Claim
Patent Images
1. An optical transmission device comprising:
- a master laser configured to generate a master signal;
a VCSEL configured for optical injection locking by the master laser, and configured to generate a VCSEL output signal comprising a carrier component and a modulated sideband component; and
an equalizer unit configured to receive the VCSEL output signal and output an equalized output signal having a reduced ratio of carrier component power to modulated sideband component power in comparison to the VCSEL output signal.
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Abstract
Optical transmitters for radio over fiber systems are disclosed. More particularly, the optical transmitters include optically-injection-locked vertical cavity surface-emitting laser devices (OIL VCSELS). The transmitters include a master laser, at least one slave laser injection-locked by the master laser, and an equalizer/filter unit that enables the ratio of the carrier power to the sideband power in the output signal of the transmitter to be varied and optimized independently of the injection ratio of the transmitter.
130 Citations
24 Claims
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1. An optical transmission device comprising:
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a master laser configured to generate a master signal; a VCSEL configured for optical injection locking by the master laser, and configured to generate a VCSEL output signal comprising a carrier component and a modulated sideband component; and an equalizer unit configured to receive the VCSEL output signal and output an equalized output signal having a reduced ratio of carrier component power to modulated sideband component power in comparison to the VCSEL output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12)
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10. An optical transmission device, comprising:
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a master laser; a first VCSEL configured for optical injection locking by the master laser, and configured to generate a first VCSEL output signal comprising a first carrier component and a first modulated sideband component; a first three-port optical filter configured to receive the first VCSEL output signal from the first VCSEL, separate the first carrier component and the first modulated sideband component, and separately transmit the first carrier component and the first modulated sideband component; and a second VCSEL configured for optical injection locking by the master laser by receiving the first carrier component from the first three-port optical filter, and configured to generate a second VCSEL output signal comprising a second carrier component and a second modulated sideband component; a second three-port optical filter configured to receive the second VCSEL output signal from the second VCSEL, separate the second carrier component and the second modulated sideband component, and separately transmit the second carrier component and the second modulated sideband component. - View Dependent Claims (11)
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13. An optical transmission method comprising:
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injection locking a VCSEL by a master laser; operating the VCSEL to generate a VCSEL output signal comprising a carrier component and a modulated sideband component; transmitting the VCSEL output signal to an equalizer unit; forming an equalized output signal in the equalizer unit, wherein the equalized output signal comprises a reduced ratio of carrier component power to modulated sideband component power in comparison to the VCSEL output signal; and outputting the equalized output signal. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 24)
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22. An optical transmission method comprising:
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injection locking a first VCSEL by a master laser; operating the first VCSEL to generate a first VCSEL output signal comprising a first carrier component and a first modulated sideband component; routing the first VCSEL output signal to a first three-port optical filter; separating the first carrier component and the first modulated sideband component with the first three-port optical filter; separately transmitting the first carrier component and the first modulated sideband component from the first three-port optical filter; injection locking a second VCSEL using the first carrier component; operating the second VCSEL to generate a second VCSEL output signal comprising a second carrier component and a second modulated sideband component; routing the second VCSEL output signal to a second three-port optical filter; separating the second carrier component and the second modulated sideband component with the second three-port optical filter; and separately transmitting the second carrier component and the second modulated sideband component from the second three-port optical filter. - View Dependent Claims (23)
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Specification