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US 2017/0285436 A1Published application
Differential phase biasing modulator apparatus and method
OwnerMichael J. Hochberg, Matthew Akio Streshinsky +1inventors
InventorsMichael J. Hochberg, Matthew Akio Streshinsky, Ari Novack
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Abstract
A circuit that allows the control of a parameter in each arm of a Mach-Zehnder interferometer or modulator in push-pull mode using a single control terminal and a ground (or a differential driving circuit). The parameter that is controlled can be a phase shift, a modulation or an attenuation. The magnitude and the frequency of the parameter can be adjusted.
Claims28
An optoelectronic device, comprising:
- an optical carrier having two arms:
- a first of said two arms having a first optical input port configured to receive a first input optical signal, and a first optical output port configured to provide a first modified optical signal;
- a second of said two arms having a second input optical port configured to receive a second input optical signal, and a second optical output port configured to provide a second modified optical signal;
- a first diode having a first polarity, said first diode configured to modify a property of said first of said two arms of said optical carrier;
- a second diode having a second polarity, said second diode configured to modify said property of a second of said two arms of said optical carrier;
- said first diode and said second diode connected in parallel connection between a first electrical terminal and a second electrical terminal, said second polarity of said second diode opposite to said first polarity of said first diode.
3 more elements
A method of manipulating an optical signal, comprising the steps of:
- providing an optoelectronic device, comprising:
- an optical carrier having two arms:
- a first of said two arms having a first optical input port configured to receive a first input optical signal, and a first optical output port configured to provide a first modified optical signal;
- a second of said two arms having a second input optical port configured to receive a second input optical signal, and a second optical output port configured to provide a second modified optical signal;
- a first diode having a first polarity, said first diode configured to modify a property of said first of said two arms of said optical carrier;
- a second diode having a second polarity, said second diode configured to modify said property of a second of said two arms of said optical carrier;
- and
- said first diode and said second diode connected in parallel connection between a first electrical terminal and a second electrical terminal, said second polarity of said second diode opposite to said first polarity of said first diode;
- applying a time-variable electrical signal to said first electrical terminal and said second electrical terminal, said time-variable electrical signal causing only one of said first diode and said second diode to attain a threshold voltage at any one time;
- providing at a selected one of said first optical input port and said first optical input port a respective input optical signal;
- observing a modified optical signal at a respective one of said first optical output port and said second optical output port;
- and
- performing at least one of recording said modified optical signal, transmitting said modified optical signal to another apparatus, and displaying said modified optical signal to a user.
10 more elements
Dependencies are inferred from the claim text.