Opto-electronic device for frequency standard generation and terahertz-range optical demodulation based on quantum interference
- Pasadena, CA
- H.o slashed.jbjerg, DK
- LaCanada, CA
An opto-electronic system and technique for comparing laser frequencies with large frequency separations, establishing new frequency standards, and achieving phase-sensitive detection at ultra high frequencies. Light responsive materials with multiple energy levels suitable for multi-photon excitation are preferably used for nonlinear mixing via quantum interference of different excitation paths affecting a common energy level. Demodulation of a carrier with a demodulation frequency up to 100's THZ can be achieved for frequency comparison and phase-sensitive detection. A large number of materials can be used to cover a wide spectral range including the ultra violet, visible and near infrared regions. In particular, absolute frequency measurement in a spectrum from 1.25 .mu.m to 1.66 .mu.m for fiber optics can be accomplished with a nearly continuous frequency coverage.
- Research Organization:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- DOE Contract Number:
- FG03-94ER14473
- Assignee:
- California Institute of Technology (Pasadena, CA)
- Patent Number(s):
- US 5866896
- Application Number:
- 08/799169
- OSTI ID:
- 872130
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
device
frequency
standard
generation
terahertz-range
optical
demodulation
based
quantum
interference
technique
comparing
laser
frequencies
separations
establishing
standards
achieving
phase-sensitive
detection
ultra
light
responsive
materials
multiple
energy
levels
suitable
multi-photon
excitation
preferably
nonlinear
mixing
via
paths
affecting
common
level
carrier
100
thz
achieved
comparison
cover
wide
spectral
range
including
violet
visible
near
infrared
regions
particular
absolute
measurement
spectrum
25
66
fiber
optics
accomplished
nearly
continuous
coverage
modulation frequency
phase-sensitive detection
sensitive detection
frequency measurement
spectral range
near infrared
quantum interference
fiber optics
energy level
fiber optic
energy levels
ultra violet
electronic device
responsive material
infrared region
laser frequencies
linear mix
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