Cold atoms are important for precision atomic applications including timekeeping and sensing. The 3D magneto-optical trap (3D-MOT), used to produce cold atoms, will benefit from photonic integration improve reliability reduce size, weight, cost. These traps require the delivery of multiple, large area, collimated laser beams an vacuum cell. Yet, date, beam using integrated waveguide approach has remained elusive. Here we report demonstration a 87Rb 3D-MOT fiber-coupled circuit deliver all...

We demonstrate 0.034 dB/m loss waveguides in a 200-mm wafer-scale, silicon nitride (Si3N4) CMOS-foundry-compatible integration platform. fabricate resonators that measure up to 720 million intrinsic Q resonator at 1615 nm wavelength with 258 kHz linewidth. This is used realize Brillouin laser an energy-efficient 380 µW threshold power. The performance achieved by reducing scattering losses through combination of single-mode TM waveguide design and etched blanket-layer low-pressure chemical...

Laser stabilization sits at the heart of many precision scientific experiments and applications, including quantum information science, metrology atomic timekeeping. These systems narrow laser linewidth stabilize carrier by use Pound-Drever-Hall (PDH) locking to a table-scale, ultra-high quality factor (Q), vacuum spaced Fabry-Perot reference cavity. Integrating these cavities, bring characteristics PDH chip-scale, is critical reduce their size, cost, weight, enable wide range portable...

Abstract High quality-factor (Q) optical resonators are a key component for ultra-narrow linewidth lasers, frequency stabilization, precision spectroscopy and quantum applications. Integration in photonic waveguide platform is to reducing cost, size, power sensitivity environmental disturbances. However, date, the Q of all-waveguide has been relegated below 260 Million. Here, we report Si 3 N 4 resonator with 422 Million intrinsic 3.4 Billion absorption-limited Qs. The 453 kHz intrinsic, 906...

Atomic, molecular and optical (AMO) visible light systems are the heart of precision applications including quantum, atomic clocks metrology. As these scale in terms number lasers, wavelengths, components, their reliability, space occupied, power consumption will push limits using traditional laboratory-scale lasers optics. Visible photonic integration is critical to advancing AMO based sciences applications, yet key performance aspects remain be addressed, most notably waveguide losses...

Abstract Heterogeneous and monolithic integration of the versatile low-loss silicon nitride platform with low-temperature materials such as electronics photonics, III–V compound semiconductors, lithium niobate, organics, glasses has been inhibited by need for high-temperature annealing well different process flows thin thick waveguides. New techniques are needed to maintain state-of-the-art losses, nonlinear properties, CMOS-compatible processes while enabling this next generation 3D...

Photonic integrated lasers with an ultra-low fundamental linewidth and a high output power are important for precision atomic quantum applications, high-capacity communications, fiber sensing, yet wafer-scale solutions have remained elusive. Here we report stimulated Brillouin laser (SBL), based on photonic molecule coupled resonator design, that achieves sub-100-mHz greater than 10-mW in the C band, fabricated 200-mm silicon nitride (Si3N4) CMOS-foundry compatible platform. The design is...

Optical resonator-based frequency stabilization plays a critical role in ultra-low linewidth laser emission and precision sensing, atom clocks, quantum applications. However, there has been limited success translating traditional bench-top cavities to compact on-chip integrated waveguide structures that are compatible with photonic integration. The challenge lies realizing waveguides not only deliver low optical loss but also exhibit thermo-optic coefficient noise stability. Given the...

Integrating precise, stable, ultra-low noise visible light lasers into atomic systems is critical for advancing quantum information sciences and improving scalability portability. Trapped ions are a leading approach high-fidelity computing, high-accuracy optical clocks, precision sensors. However, current ion-based rely on bulky, lab-scale stabilization cavities clock qubit operations, constraining the size, weight, scalability, portability of systems. Chip-scale integration reference...

Abstract Today’s precision experiments for timekeeping, inertial sensing, and fundamental science place strict requirements on the spectral distribution of laser frequency noise. Rubidium-based utilize table-top 780 nm systems high-performance clocks, gravity sensors, quantum gates. Wafer-scale integration these lasers is critical enabling systems-on-chip. Despite progress towards chip-scale ultra-narrow linewidth lasers, achieving sub-Hz sub-kHz integral has remained elusive. Here we report...

Narrow linewidth visible light lasers are critical for atomic, molecular and optical (AMO) physics including atomic clocks, quantum computing, spectroscopy, sensing. Stimulated Brillouin scattering (SBS) is a promising approach to realize highly coherent on-chip laser emission. Here we report demonstration of photonic integrated laser, with emission at 674 nm, 14.7 mW threshold, corresponding threshold density 4.92 μm-2, 269 Hz linewidth. Significant advances in silicon nitride/silica...

Today's state of the art precision experiments in quantum, gravimetry, navigation, time keeping, and fundamental science have strict requirements on level spectral distribution laser frequency noise. For example, interaction with atoms qubits requires ultra-low noise at multiple offset frequencies due to hyperfine atomic transitions, motional sidebands, fast pulse sequencing. Chip-scale integration lasers that meet these is essential for reliability, low-cost, weight. Here, we demonstrate a...

The integration of stabilized lasers, sources that generate spectrally pure light, will provide compact, low-cost solutions for applications including quantum information sciences, precision navigation and timing, metrology, high-capacity fiber communications. We report a significant advancement in this field, demonstrating stabilization an integrated waveguide Brillouin laser to reference cavity, where both resonators are fabricated using the same CMOS-compatible platform. demonstrate...

We describe a silicon nitride (Si3N4) photonic integrated circuit (PIC) designed to deliver non-diverging 780nm free-space optical cooling beams an 87Rb atomic magneto optic trap (MOT) via fiber coupled ultra-large-area 3.88mm × 2.08mm gratings

Integrated narrow-linewidth lasers in the visible and near-IR are a critical component of next-generation atomic systems for quantum sensing, time keeping, navigation. Technologies such as low frequency noise that tunable referenced to an absolute set by transitions required sensing applications cold atom interferometers. While bulk-optic reference cavities can be used laser reduction stabilization, longer-term drifts mitigated with secondary lock using power-consuming bulk optic...

Ultra-high-quality-factor ( Q ) resonators are a critical component for visible to near-infrared (NIR) applications, including quantum sensing and computation, atomic timekeeping navigation, precision metrology, microwave photonics, fiber optic communications. Implementing such in an ultra-low-loss CMOS foundry compatible photonic integration platform can enable the transitioning of components from lab- chip-scale, as ultra-low-linewidth lasers, optical reference cavities, scanning...

We stabilize a 780 nm semiconductor laser to thermally tuned 118 million Q silicon nitride photonic resonator. The stabilized is swept by 400 MHz and probes rubidium transitions at 500 Hz rate.

In this paper, we have developed an inclusive model for top-gated doped graphene field-effect transistor (GFET). The proposed is concise and accurate calculations of the electrical parameters that are used in digital circuit design. doping single layer sheet one ways to create a bandgap as well introduce threshold voltage (V TH) concept GFET. Further, modelled expressions estimation quantum capacitance (Cq ), which modelling drain current (ID small-signal transconductance gain (gm), output...

We report integrated silicon nitride resonators with 0.65 dB/m loss and $90\times10^{6}$ intrinsic Q at 674 nm 0.5 $103\times10^{6}$ 780 nm. demonstrate laser stabilization over two orders magnitude frequency noise reduction.

We report an integrated Si 3 N 4 3m length waveguide coil resonator for operation at 674nm. Stabilization of a laser to this cavity is demonstrated, resulting in orders magnitude FN reduction, ILW 4.2kHz and ADEV 3.5x10 -12 .

Cytological studies of the Indian lac insect Kerria lacca (Kerr) resulted in contrary reports suggesting two quite distinct chromosome systems, orthodox and unorthodox " Lecanoid system. Genetic tests with first discovered mutant, namely yellow, confirmed elimination paternal K. lacca, but unlike system male was found to express allele. The results reported here other marker genes provide further evidence that genetic differs from gene expression.

We demonstrate a frequency modulated 780 nm Brillouin laser pumped by semiconductor laser. achieve 1.4 kHz 1/p integral linewidth and 24 Hz fundamental 22 modulation bandwidth.