All articles tagged with #integrated photonics
Scientists demonstrated a Mamyshev-oscillator-based ultrafast laser on a photonic chip, producing 1.05 nanojoules in 147-femtosecond bursts on a chip compact enough to fold from a long laser cavity, potentially enabling portable, cost-effective imaging, diagnostics, and timing applications by leveraging silicon-photonic fabrication.
Researchers demonstrate a photonic integrated, erbium-ion-implanted Mamyshev oscillator on silicon nitride that produces a 176‑MHz train of nanojoule pulses without external seeding, which can be linearly compressed to 147 fs and directly generate a 1.5‑octave supercontinuum in a Si3N4 waveguide; the same source enables THz time-domain spectroscopy with 5 THz bandwidth and 90‑dB dynamic range, underscoring potential for chip-scale metrology and portable spectroscopy.
Researchers at JQI designed a chip consisting of an array of resonators that exploit two distinct light-circulation timescales to passively satisfy frequency-phase matching, enabling second-, third-, and fourth-harmonic generation from a 190 THz input without active tuning. The on-chip generation of new colors (red, green, blue) eliminates the need for additional lasers or heaters and could impact metrology and nonlinear optical computing by providing compact, scalable light sources.
Researchers have developed a hybrid wafer stack combining lithium niobate (LiNbO3) and silicon nitride (Si3N4) that allows for fast frequency tuning and modulation stability in lasers. The hybrid chip utilizes microresonator structures to achieve laser self-injection locking and voltage-controlled frequency tuning. The study demonstrates the successful application of the hybrid circuit in LiDAR technology and highlights the potential of thin-film LiNbO3 structures in photonics.
Researchers in Germany and the Netherlands have developed a complete entangled photon source on a chip that is about the size of a one euro coin. The team used a new architecture to combine several integrated photonic technologies into one device, creating a photonics system-on-a-chip that generates entangled photons. The chip creates pairs of frequency-entangled photons with 99% fidelity about 1000 times per second. The team is now working towards extending the on-chip photonic capabilities to include the creation of multiphoton cluster states.