Spectroscopy system with beat component
A light ranging and detection system achieving reconfigurable very wide field of view, high sampling of spatial points per second with high optical power handling by using architecture to efficiently combine different wavelengths, time and frequency coding, and spatial selectivity. The transmitter is capable of generating multiple narrow beams, encoding different beams and transmitting in different spatial directions. The receiver can differentiate and extract range and reflectivity information of reflected beams. Three dimensional imaging of the environment is achieved by scanning the field of view of the transmitter. Control and signal processing electronic circuitries fabricated in a chip are packaged together with a chip containing the photonic components of the ranging system. The light ranging and detection system generates a THz beam in addition to an optical beam, and both beams combined allow reconfigurable spectroscopy.
1. A device comprising:
a plurality of tunable lasers generating a plurality of wavelengths;
a plurality of wavelength lockers to reduce wavelength noise from the plurality of wavelengths;
a plurality of encoders, each encoder configured to encode light of a wavelength locker of the plurality of wavelength lockers;
at least one broadband combiner to combine outputs of the plurality of encoders;
a plurality of emitters connected to the at least one broadband combiner; and
a non-linear material configured to create a beat wave from two wavelengths, the beat wave having a frequency between 1 and 100 THz.
2. The device of claim 1 , wherein each emitter of the plurality of emitters comprises a grating coupler.
3. The device of claim 1 , wherein the plurality of encoders is configured to encode amplitude of the light, phase of the light, or both amplitude and phase of the light.
4. The device of claim 1 , wherein the plurality of lasers operates in pulsed mode.
5. The device of claim 1 , wherein the plurality of lasers operates in frequency modulated continuous wave mode.
6. The device of claim 1 , wherein the device comprises Si, and a thickness of Si decreases progressively from a first side of the device comprising the plurality of lasers, to a second side of the device comprising the plurality of emitters.
7. The device of claim 6 , wherein the thickness of Si at the first side is 3 micrometers, and the thickness of Si at the second side is 1 micrometer.