Abstract: An atomic sensing method, the method including providing a polarization converter; emitting a linearly polarized polychromatic laser beam to the polarization converter; converting, by the polarization converter, the linearly polarized polychromatic laser beam into a circularly-polarized laser beam and a linearly-polarized laser beam; combining the circularly-polarized laser beam and the linearly-polarized laser beam thereby yielding a multi-polarization polychromatic laser beam; transmitting the multi-polarization polychromatic laser beam to an atomic vapor cell comprising alkali metal atoms, polarizing the multi-polarization polychromatic laser beam into two laser beams, and detecting the two laser beams by two photodetectors, respectively.

Abstract: An atomic sensing method, the method including providing a polarization converter; emitting a linearly polarized polychromatic laser beam to the polarization converter; converting, by the polarization converter, the linearly polarized polychromatic laser beam into a circularly-polarized laser beam and a linearly-polarized laser beam; combining the circularly-polarized laser beam and the linearly-polarized laser beam thereby yielding a multi-polarization polychromatic laser beam; transmitting the multi-polarization polychromatic laser beam to an atomic vapor cell comprising alkali metal atoms, polarizing the multi-polarization polychromatic laser beam into two laser beams, and detecting the two laser beams by two photodetectors, respectively.

Abstract: A physical unit of a chip-scale nuclear magnetic resonance (NMR) gyroscope, the physical unit including: a vertical cavity surface emitting laser (VCSEL), a silicon sheet including a recess, a glass sheet, an atomic vapor chamber, a first right angle prism, a quarter-wave plate, a polarizing beam splitter, and photodetectors. The recess includes sides including reflecting mirrors. The glass sheet is disposed on the silicon sheet. The recess of the silicon sheet is in a structure of an inverted square frustum, and the reflecting mirrors are disposed on sides of the recess. The atomic vapor chamber is an enclosed region formed between the recess and the glass sheet. The atomic vapor chamber is filled with alkali metal atoms, one or a plurality of inert gas atoms, and one or a plurality of buffer gases.

Abstract: A physical unit of a chip-scale nuclear magnetic resonance (NMR) gyroscope, the physical unit including: a vertical cavity surface emitting laser (VCSEL), a silicon sheet including a recess, a glass sheet, an atomic vapor chamber, a first right angle prism, a quarter-wave plate, a polarizing beam splitter, and photodetectors. The recess includes sides including reflecting mirrors. The glass sheet is disposed on the silicon sheet. The recess of the silicon sheet is in a structure of an inverted square frustum, and the reflecting mirrors are disposed on sides of the recess. The atomic vapor chamber is an enclosed region formed between the recess and the glass sheet. The atomic vapor chamber is filled with alkali metal atoms, one or a plurality of inert gas atoms, and one or a plurality of buffer gases.

Abstract: A physical system for a chip-scale coherent population trapping (CPT) atomic clock. The physical system includes: a vertical-cavity surface-emitting laser (VCSEL) device, a first polarizing beam splitter, a first ?/4 wave plate, a chip of an atomic vapor cell, a second ?/4 wave plate, a reflection device, a lens, a second polarizing beam splitter, and a photo detector. The first polarizing beam splitter, the first ?/4 wave plate, the chip of the atomic vapor cell, the second ?/4 wave plate, and the reflection device are disposed in sequence. The lens, the second polarizing beam splitter, and the photo detector are disposed in sequence.

Abstract: A device for producing a coherent bi-color light source, including: an array substrate, a first laser tube driven by a first direct current signal, a second laser tube driven by a modulation signal coupled by a microwave signal and a second DC signal, a half wave plate, a birefringent crystal, a first quarter wave plate, a partially reflecting plane mirror, and a second quarter wave plate. The first laser tube and the second laser tube are fixed on the array substrate. The half wave plate, the birefringent crystal, the first quarter wave plate, the partially reflecting plane mirror, and the second quarter wave plate are disposed in sequence in an emission direction of a laser beam emitted by the first laser tube. The second laser tube is disposed opposite to the birefringent crystal.

Abstract: A device for producing a coherent bi-color light source, including: an array substrate, a first laser tube driven by a first direct current signal, a second laser tube driven by a modulation signal coupled by a microwave signal and a second DC signal, a half wave plate, a birefringent crystal, a first quarter wave plate, a partially reflecting plane mirror, and a second quarter wave plate. The first laser tube and the second laser tube are fixed on the array substrate. The half wave plate, the birefringent crystal, the first quarter wave plate, the partially reflecting plane mirror, and the second quarter wave plate are disposed in sequence in an emission direction of a laser beam emitted by the first laser tube. The second laser tube is disposed opposite to the birefringent crystal.

Abstract: A physical system for a chip-scale coherent population trapping (CPT) atomic clock. The physical system includes: a vertical-cavity surface-emitting laser (VCSEL) device, a first polarizing beam splitter, a first ?/4 wave plate, a chip of an atomic vapor cell, a second ?/4 wave plate, a reflection device, a lens, a second polarizing beam splitter, and a photo detector. The first polarizing beam splitter, the first ?/4 wave plate, the chip of the atomic vapor cell, the second ?/4 wave plate, and the reflection device are disposed in sequence. The lens, the second polarizing beam splitter, and the photo detector are disposed in sequence.