Precision photonic oscillator and method for generating an ultra-stable frequency reference using a two-photon rubidium transition
First Claim
1. An ultra-stable frequency reference generating system comprising:
- a cavity-stabilized reference laser comprising a laser source locked to a stabilized cavity to generate a stabilized laser output;
a frequency doubler configured to double a frequency of the stabilized laser output to form a frequency-doubled stabilized laser output;
a Rubidium cell configured to be interrogated by the frequency-doubled stabilized laser output to cause at least a two-photon Rubidium transition;
a detector to detect fluorescence resulting from spontaneous decay of the Rubidium transition; and
a frequency comb stabilizer locked to the stabilized laser output to generate an optical output for use in generating an ultra-stable frequency reference.
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Abstract
Embodiments of an ultra-stable frequency reference generating system and methods for generating an ultra-stable frequency reference using a two-photon Rubidium transition are generally described herein. In some embodiments, a cavity-stabilized reference laser comprising a laser source is locked to a stabilized cavity. A Rubidium cell is interrogated by a stabilized laser output to cause at least a two-photon Rubidium transition and a detector may detect fluorescence resulting from spontaneous decay of the upper state Rubidium transition. The output of the detector is provided at a wavelength of the fluorescence to lock the cavity-stabilized reference laser to generate a stabilized laser output. A frequency comb stabilizer may be locked to the stabilized laser output to generate a super-continuum of optical wavelengths for use in generating an ultra-stable frequency reference.
42 Citations
25 Claims
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1. An ultra-stable frequency reference generating system comprising:
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a cavity-stabilized reference laser comprising a laser source locked to a stabilized cavity to generate a stabilized laser output; a frequency doubler configured to double a frequency of the stabilized laser output to form a frequency-doubled stabilized laser output; a Rubidium cell configured to be interrogated by the frequency-doubled stabilized laser output to cause at least a two-photon Rubidium transition; a detector to detect fluorescence resulting from spontaneous decay of the Rubidium transition; and a frequency comb stabilizer locked to the stabilized laser output to generate an optical output for use in generating an ultra-stable frequency reference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method to generate an ultra-stable frequency reference comprising:
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locking a laser source to a stabilized cavity to generate a pre-stabilized laser output; further locking the laser source to a decay of a two-photon Rubidium transition to generate a stabilized laser output; doubling a frequency of the stabilized laser output to generate a frequency-doubled stabilized laser output; and locking a frequency comb stabilizer to the frequency-doubled stabilized laser output to generate an optical output for use in generating an ultra-stable frequency reference. - View Dependent Claims (14, 15, 16, 17)
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18. An ultra-stable frequency reference generating system comprising:
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a cavity lock loop to lock a laser source to a stabilized cavity and generate a pre-stabilized laser output; a frequency control loop to further lock the laser source to a decay of an upper state Rubidium transition using two photon excitation to generate a stabilized laser output; a frequency doubler to double a frequency of the stabilized laser output to form a frequency-doubled stabilized laser output; a frequency comb stabilizer having a first frequency comb stabilizer control loop to stabilize a frequency comb relative to zero frequency and a second frequency comb stabilizer control loop to stabilize a frequency comb spacing, wherein the frequency comb stabilizer is locked to the frequency-doubled stabilized laser output to generate optical wavelengths for use in generating an ultra-stable frequency reference. - View Dependent Claims (19, 20, 21, 22)
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23. A method to generate an ultra-stable frequency reference comprising:
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generating a stabilized laser output from a cavity-stabilized reference laser that includes a laser source locked to a stabilized cavity; doubling a frequency of the stabilized laser output to generate a frequency-doubled stabilized laser output; interrogating a Rubidium cell by the frequency-doubled stabilized laser output to cause at least a two-photon Rubidium transition; and detecting fluorescence resulting from spontaneous decay of the Rubidium transition to provide a detected output at a wavelength of the fluorescence;
alocking the cavity-stabilized reference laser to the wavelength of the fluorescence; and locking a frequency comb stabilizer to the stabilized laser output to generate a continuum of optical wavelengths. - View Dependent Claims (24, 25)
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Specification