The Infleqtion Fixed PICAS (Photonically Integrated Cold Atom Sources) is a compact, alignment-free beam delivery package. It produces a 2D+ MOT beam configuration with three user-supplied fiber-coupled light inputs, capable of producing a cold atom flux of >10⁹ atoms per second when used with Infleqtion’s well-established CASC, Cold Atom Source Cell. The unit is easily integrated into the MAG-2000 magnet assembly, allowing a simple plug-and-play optical package.
An optional photodiode configuration provides polarisation cleaning and power monitoring capability for all three beams.
Features
- Compact Optics System
- Simple 2D MOT Alignment
- Pre-defined Polarization
- Monitor laser power for automated process control
Design Wavelengths and Elements
- 780 nm (Rubidium)
- 852 nm (Cesium)
Download datasheet here.
Related Research:
PICAS: Photonically Integrated Cold Atom Source
We present a compact optical delivery design for a 2D+ MOT used with a magnetic assembly and a commercial vacuum piece to create a standardised cold atom source. PICAS provides a plug-and-play system, free of optical alignment, capable of producing an atomic flux of >1e9 atoms per second with <50mW of laser power. The dimensions of the system are 67mm x 67mm x 112mm (W x H x L), where such compactness is achieved through a fixed optical design, additive manufacturing techniques, and a novel beam expansion method that forms a multiply split cylindrical beam.
Progress towards a portable cold-atom pressure standard
All existing pressure standards (classical and quantum-based) are large apparatuses - typically, the size of a van or larger. In this thesis, we report on the progress towards building a portable version of a cold-atom based pressure standard which can easily transported by a van instead. Specifically, we discuss - the flexible laser design that can produce 780 nm pump light anywhere in a 26 GHz range and repump light anywhere in a +/- 6.8 GHz range within <1 MHz with no realignment. - the magnetic field coils that can produce gradients in excess of 400 G/cm without changing temperature (provided that >14 mL/s of 10 C to 15 C water is available. - the low-outgassing vacuum chamber that can supply rubidium for measurement while minimizing contamination in the chamber under test. - preliminary results characterizing the performance of its rubidium source and magneto-optical trap. - future plans for the apparatus. This pressure standard leverages the linear relationship between the pressure of a vacuum.