Recycled carrier modulation in compound resonator configurations
AssigneePhase Sensitive Innovations, Inc.
InventorsJanusz Murakowski, Garrett Schneider, Christopher A. Schuetz, Dennis W. Prather
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Abstract
An optical modulation apparatus for modulating an electromagnetic (e.g., radio frequency (RF)) signal onto an optical carrier signal may be arranged to feed back at least a portion of the optical carrier signal, while excluding first-order sidebands, which may help increase modulation efficiency and improve output power, while retaining high modulation bandwidth. Such arrangements may be implemented, for example, using a Fabry-Perot resonator or a ring resonator in combination with a Mach-Zehnder interferometer or a Michelson interferometer.
Claims17
An apparatus for modulating an optical carrier, the apparatus including:
- a modulator configured to modulate a radio-frequency (RF) signal from an RF input of the modulator onto an optical carrier signal from an optical input of the modulator to generate a modulated signal;
- and
- an optical apparatus configured to feed back to the optical input of the modulator at least a portion of the optical carrier and even-order sideband components of the modulated signal to the optical input of the modulator and to not feed back the odd-order sideband components of the modulated signal.
A method of modulating a radio-frequency (RF) signal onto an optical carrier signal, the method including:
- modulating an RF input signal onto an optical carrier signal to produce a modulated signal;
- and
- feeding back at least a portion of optical carrier and even-order sideband components of the modulated signal, without feeding back odd-order sideband components of the modulated signal, and combining the at least a portion of the optical carrier and even-order sideband components with the optical carrier signal prior to said modulating.
An apparatus for modulating an optical carrier, the apparatus including:
- a separating modulator configured to modulate a radio-frequency (RF) signal from an RF input of the modulator onto an optical carrier signal from an optical input of the modulator to generate a modulated signal and to substantially separate resulting first-order sidebands from the optical carrier signal;
- and
- an optical apparatus configured to feed back at least a portion of the optical carrier signal to the optical input of the modulator and to substantially suppress feedback of the first-order sideband components of the modulated signal.
A method of modulating a radio-frequency (RF) signal onto an optical carrier signal, the method including:
- modulating the RF input signal onto an input optical carrier signal to produce a modulated signal;
- substantially separating resulting first-order sidebands in the modulated signal from an optical carrier signal component in the modulated signal;
- feeding back at least a portion of the optical carrier signal component separated from the first-order sidebands while suppressing feedback of the first-order sidebands components of the modulated signal;
- and
- combining the at least a portion of the optical carrier signal component with the input optical carrier signal prior to said modulating.
Dependencies are inferred from the claim text.