A thin-film periodically poled lithium niobate waveguide was designed and fabricated which generates entangled photon pairs at telecommunications wavelengths with high coincidences-to-accidentals counts ratio CAR>67000, two-photon interference visibility V>99%, heralded single-photon autocorrelation g_{H}^{(2)}(0)<0.025. Nondestructive in situ diagnostics were used to determine the poling quality 3D. Megahertz rates of generated by less than a milliwatt pump power, simplifying requirements...

Silicon (Si) photonics is forming a fabless ecosystem, which enabling low-cost and densely integrated components for optical communications quantum information. We present Si transmitter polarization-encoded key distribution (QKD). The chip was fabricated in standard photonic foundry process together pulse generator, intensity modulator, variable attenuator, polarization modulator 1.3  mm×3  mm1.3  mm×3  mm die area. devices the circuit meet requirements QKD. used proof-of-concept...

We report measurements of time-frequency entangled photon pairs and heralded single photons at 1550 nm wavelengths generated using a microring resonator pumped optically by diode laser.Along with high spectral brightness pair generation, the conventional metrics used to describe performance, such as Coincidences-to-Accidentals Ratio (CAR), conditional self-correlation [g (2) (0)], two-photon energy-time Franson interferometric visibility etc. are shown reach highperformance regime not yet...

Silicon ring resonator-based devices, such as modulators, detectors, filters, and switches, play important roles in integrated photonic circuits for optical communication, high-performance computing, sensing applications. However, the high sensitivity to fabrication variations has limited their volume manufacturability commercial adoption. Here, we report a low-cost post-fabrication trimming method tune resonance wavelength of silicon resonator correct at wafer-scale. We use Ge implant...

We report a micro-ring modulator with 0.53 V·cm phase efficiency, 54 GHz bandwidth, and 16.3 nm FSR. have achieved 224 240 Gb/s PAM4 eye diagrams 1.6 dB 3.9 TDECQ, respectively.

This work presents a hybrid-integrated 4- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\lambda $ </tex-math></inline-formula> micro-ring modulator-based wavelength-division multiplexed (WDM) optical transmitter (OTX) in the O-band, suitable for co-packaged optics. It supports up to 112 Gb/s per wavelength using high-bandwidth modulators (MRMs) together with nonlinear equalization driver electronics. A...

We report a single-chip silicon photonic transmitter with an integrated laser and high-speed micro-ring modulator. demonstrate 128Gb/s NRZ 256Gb/s PAM4 open eye diagrams signal-to-noise ratio (SNR) of 4.1 penalty (TDECQ) 1.5 dB, respectively, <2.0Vpp drive voltage.

Entanglement is crucial for quantum networks and computation, yet maintaining high-fidelity entangled states hindered by decoherence resource-intensive purification methods. Here, we experimentally demonstrate entanglement pumping, utilizing bosonic error correction (QEC) codes as long-coherence-time storage qubits. By repetitively generating with short-coherence-time qubits injecting it into QEC-protected logical qubits, our approach effectively preserves entanglement. Through detection to...

We demonstrate a silicon micro-ring modulator supporting 128 Gb/s NRZ modulation with SNR=5.2, ER=3.8dB, 0.8 Vpp drive swing, and 5.3 fJ/bit power consumption. have also achieved 192 PAM-4 TDECQ of 2.5dB.

Silicon photonics-based optical 1/O is a promising technology direction to meet the ever growing off-chip bandwidth needs of data-intensive computing. While silicon photonic (SiPh) transceivers are increasingly being used in pluggable modules for data center communications, power efficiency and latency constraints their integration XPU/switch packages (such as recent demonstrations [1], [2]) significantly more stringent, requiring different solutions. Ring resonator-based transceiver...

We present a 256 Gb/s (8$\lambda$*32 Gb/s/$\lambda$) 3D-integrated silicon photonic (SiPh) receiver suitable for integration in XPU/switch packages. The IC (PIC) integrates multi-wavelength laser, optical amplifier, and cascaded micro-ring resonators (MRRs) to implement dense wavelength division multiplexing (DWDM) with minimal footprint. 28nm CMOS electronic includes eight SerDes channels, PIC interface/control electronics. A dither-based thermal control unit tunes MRRs the demux align...

We demonstrate a 3-D heterogeneously integrated dense wavelength-division multiplexing (DWDM) silicon-photonic transmitter simultaneously modulating eight 200-GHz spaced wavelengths at 50 Gbps/ <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\lambdab $</tex-math> </inline-formula> each, to deliver an aggregate per-fiber bandwidth of 400 Gbps. All necessary notation="LaTeX">$O$</tex-math> -band optical...

We demonstrate an all-silicon micro-ring resonant photodetector with a responsivity of 0.23 A/W and dark current &lt;100nA capable detecting 112 Gb/s PAM4 signal eye closure penalty &lt;1.0 dB.

A photonic platform with two passive silicon nitride layers atop an active layer is demonstrated. It supports ultra-low loss (< 0.003dB) and crosstalk −52dB) crossings efficient depletion modulation diodes VπL of 2.6 V-mm.

Silicon microring resonators are being recently used for high-brightness and efficient photon-pair generation at telecommunication wavelengths. Here, based on detailed theoretical numerical modeling, we study the impact pair of increasing optical pump power, which generally causes nonlinear impairments such as free-carrier two-photon absorption in silicon micro-resonators. Contrary to expectation, properties devices may seem be preserved powers, although not better than a moderate power....

We demonstrate a 256Gbps WDM transceiver with eight 200GHz-spaced wavelengths simultaneously modulated at 32Gbps and <1e-12 BER. The system includes silicon photonic PIC integrated lasers, microring modulators, SOAs, Ge photodetectors, co-designed CMOS EIC.

Traditional entangled photon pair generation apparatus, such as periodically-poled nonlinear crystals or microstructured fibers, require special and complex device structures to permit spontaneous interactions at different wavelengths occur simultaneously. This makes it difficult design a single that can, for example, generate high-quality, high-brightness pairs both the 1310 1550 nm wavelength bands. Such flexibility will be useful in reconfiguring quantum communications co-exist with data...

We report photon pairs and heralded single photons generated at 1310 nm wavelengths using silicon photonics technology, demonstrating that comparable performance could be achieved when a microring resonator was pumped either by desktop laser instrument or an electrically injected, room-temperature hybrid laser. Measurements showed 130 kilo-coincidence-counts per second pair rates generated, with coincidences-to-accidentals ratio approximately 100 about 0.34 mW optical pump power...

A fraction of a classical 10 Gigabits-per-second, non-return-to-zero data stream at 1.55 micron wavelengths from standard telecommunications optical transceiver was tapped and used to generate photon-pairs heralded single photons using silicon microring resonator room temperature. These results show that there may be no need for separate laser high-quality photon pairs quantum applications in typical communications network.

We demonstrate a 4λ ring-based WDM transceiver, with all-silicon ring photodetectors, modulators and all necessary CMOS transceiver electronics. All four channels are verified at 50 Gb/s/λ better than 1e-12 BER.

We demonstrate an eight-channel DFB array with 200 GHz spacing excellent power (+/- 0.25 dB) and channel uniformity 13 GHz). The laser is fully integrated on silicon suitable for high-volume, multiwavelength applications such as co-packaged optics or optical I/O.

Multi-wavelength laser sources have gained significant interest for future high-bandwidth density DWDM optical links, enabling improved energy efficiency and bandwidth scaling. In this work, we present an integrated III-V/Si hybrid four-wavelength DFB with 200 GHz wavelength spacing <10 dBm output power per wavelength. The total variations are <±25 <1 dB, respectively, ambient temperature change of 30°C. We also measured the relative intensity noise (RIN) Lorentzian linewidth to be <-135...

We present a silicon optical transmitter for polarization-encoded quantum key distribution (QKD). The chip was fabricated in standard photonic foundry process and integrated pulse generator, intensity modulator, variable attenuator, polarization modulator 1.3 mm $\times$ 3 die area. devices the circuit meet requirements QKD. used proof-of-concept demonstration of BB84 QKD protocol over 5 km long fiber link.

We demonstrate a 4-wavelength DFB laser with &gt;8dBm output power per wavelength, &lt;±0.5dB variations, 140GHz wavelength spacing, and &lt;-140dB/Hz RIN. For data transmission at 64 Gb/s, we obtained comparable performance to benchtop laser.

Using all silicon photonic components, including an electrically-pumped hybrid laser and a high-Q ring resonator, photon pairs with non-classical correlations were generated at room temperature near 1310 nm wavelengths.