Transducers and methods of making the same include a substrate having a cavity with a diameter that supports whispering gallery modes at a frequency of an input signal. A focusing structure in the cavity focuses the electric field of the input signal. A resonator directly under the focusing structure has a crystalline structure that generates an electro-optic effect when exposed to electrical fields. An electric field of the input signal modulates an output signal in the resonator via the electro-optic effect.

A method and an arrangement of spectrally broadening laser pulses for non-linear pulse compression is disclosed which is based on the transition from the spectral broadening in a waveguide to the spectral broadening in a suitably shaped lens conductor. The arrangement is non-sensitive with respect to the variations of the pulse power, the position and parameters of the laser beam. The spectrally broadened pulses can be compressed in a satisfactory manner and the quality of the laser beam maintained by dividing the non-linear phase required for spectral broadening into sufficiently smaller steps which can be separated without non-linearity by suitable prorogation. The limitation of the pulse powers to less than the critical power of dielectrics is thus overcome and a pulse energy range for which the spectral broadening in the glass fibres cannot be used, is developed. The arrangement can compress pulses having a large average power.

A deep ultra-violet (DUV) continuous wave (CW) laser includes a fundamental CW laser configured to generate a fundamental frequency with a corresponding wavelength between about 1 m and 1.1 m, a third harmonic generator module including one or more non-linear optical (NLO) crystals that generate a third harmonic and an optional second harmonic, and a fifth harmonic generator. The fifth harmonic generator module includes a cavity resonant at the fundamental frequency, and combines the fundamental frequency with the third harmonic in a first NLO crystal to generate a fourth harmonic, then combines the fourth harmonic with unconsumed fundamental frequency in a second NLO crystal to generate the fifth harmonic. One or more lenses are used to focus the third and fourth harmonics in the first and second NLO crystals, respectively.

A device and method for high-speed tuning soliton microcomb comprising an on-chip high-Q lithium niobate (LN) microresonator as a comb resonator whose dispersion is engineered for soliton comb generation where a strong electro-optic Pockels effect is used to dynamically tune the soliton repetition rate, with integrating electrooptic tuning and modulation elements directly integrated into the comb resonator.

Disclosed are an optical modulator and control method therefor, the optical modulator includes an input waveguide, an adjustable ring-shaped resonant cavity, a feedback loop waveguide, a first mode converter, and an output waveguide. The input waveguide is configured to receive an initial optical signal, the adjustable ring-shaped resonant cavity is configured to perform resonance and modulation processing on the initial optical signal and output a first optical signal, the feedback loop waveguide is configured to receive and transmit the first optical signal, the first mode converter is configured to perform mode conversion processing on the first optical signal and output a second optical signal to the adjustable ring-shaped resonant cavity, the adjustable ring-shaped resonant cavity is further configured to perform resonance and modulation processing on the second optical signal and output a third optical signal, and the output waveguide configured to receive and output the third optical signal.

A method and system that harnesses extremely weak Kerr-type nonlinearities in a single driven cavity to deterministically generate single photon Fock states, and more general photon-blockaded states are disclosed. The disclosed scheme is effective even for nonlinearities that are much smaller than photonic loss in the cavity. The disclosed scheme generates photon-blockade states that are non-Gaussian, exhibit a sharp cut-off in their photon number distribution, and can be arbitrarily close to, for example, a single-photon Fock state. This scheme relies only standard linear and parametric drives, and are hence compatible with a variety of different photonic platforms.

A device for a nonlinear optical frequency-conversion of laser radiation comprises a multipass arrangement being arranged such that a laser radiation coupled into the multipass arrangement carries out multiple roundtrips in the multipass arrangement. The device further comprises a nonlinear optical medium-arranged at least partly within the multipass arrangement such that at least in several of the roundtrips the laser radiation coupled into the multipass arrangement passes through the nonlinear optical medium to carry out a nonlinear optical conversion of a part of the laser radiation propagating through the nonlinear optical medium into frequency-converted components based on a second order susceptibility .sup.(2) of the nonlinear optical medium. The device is configured such that the laser radiation- and the frequency-converted components propagate in the multipass arrangement-along a common beam path including at least five passes through the nonlinear optical medium.