Systems, methods, devices, and apparatuses generate a fully integrated broadband high power frequency combs, based on a multimode gain chip. Embodiments can generate a frequency comb spanning over ˜150 nm and include self-injection locking of a multimode chip-based gain, which can allow access to high pump power while maintaining single mode operation. The integrated frequency comb systems and methods can comprise a multimode gain chip, a ring resonator in optical communication with a waveguide and, and an integrated heater in thermal communication with the ring resonator. Embodiments can be configured to receive multimode gain input and effect a single-mode ring feedback to determine a target mode. A temperature of the ring resonator can be optionally adjusted to modulate the ring feedback, and the ring feedback can be applied to the multimode gain input to generate an output frequency comb that includes the target mode.

The present disclosure discloses a method and apparatus for preparing a femtosecond optical filament interference direct writing volume grating/chirped volume grating. The method is characterized in that optical filaments are formed in glass by using femtosecond pulse laser, and plasma is controlled to quickly scan in the glass and etch a volume grating or chirped volume grating structure by adjusting the focal length of convex lens, laser energy and movement of motor machine. The apparatus includes a femtosecond pulse laser module, a pulse chirp management module, a pulse time domain shaping module, a laser separation and interference module, a glass volume grating processing platform module and a camera online imaging module.

A method for generating ultrashort pulses includes directing a master beam having ultrashort pulses and at least one slave beam through an optical gate material. The intensity of the slave beam upstream of the optical gate material is lower than that of the master beam upstream of the optical gate material. The optical gate material and the pulses of the master beam are chosen to induce a Kerr effect when the master beam passes through the optical gate material, the Kerr effect producing a modulation of the phase of the slave beam in association with pulses of the master beam when the slave beam passes through the optical gate material. The modulation of the phase of the slave beam is transformed into a modulation of the amplitude thereof using a complementary optical device to generate a slave beam downstream of the optical gate material having ultrashort pulses.

Methods, systems, and apparatus for generating Kerr frequency combs. The system includes a continuous-wave pump laser to provide a master comb pump. The system includes a microresonator that generates a master Kerr frequency comb using the master comb pump. The system includes a splitter that splits the master Kerr frequency comb into multiple CW comb lines including a first comb line used to transmit a data signal and a second comb line used as a slave comb pump. The system includes a combiner that is configured to combine the first comb line and the second comb line to produce a combination of a data channel and CW comb line. The system includes a second demultiplexer that extracts the second comb line that is used as the slave comb pump. The system includes another microresonator that uses the second comb line and generates a slave Kerr frequency comb.

A self-starting mode locking soliton device includes a first optical port to accept an input coherent light. A second optical port provides an output comb of a plurality of wavelengths. A comb resonator with optical Kerr nonlinearity and anomalous group-velocity dispersion is optically coupled to both of said first optical port and said second optical port. The resonator includes an optical property of a negative nonlinear bistability to enable the self-starting mode locking of a Kerr soliton comb. A method of self-starting mode locking is described. A method of producing the negative nonlinear bistability is also described.

A method is provided for modifying a wavelength of electromagnetic radiation that propagates through a medium. The method includes providing a medium that exhibits a change in refractive index in response to a change in electric field; impinging electromagnetic radiation from a electromagnetic radiation source onto the medium such that the electromagnetic radiation propagates through the medium; and modifying at least one wavelength of the electromagnetic radiation propagating through the medium by externally inducing a temporal change in the refractive index of the medium.

An apparatus for spectral broadening of laser pulses includes a main body, a plurality of mirror elements fastened to the main body, each having a mirror surface formed thereon and configured to reflect the laser pulses the plurality of mirror elements being fastened to a main body, and at least one nonlinear optical medium for the passage of the laser pulses for the generation of a nonlinear phase (Φ.sub.NL) by self-phase modulation. The at least one nonlinear optical medium may be a sheet-like and disk-shaped solid-state optical medium and/or a gaseous optical medium.

The present invention provides an efficient quantum memory for storing a quantum state of light, such as a photon, for a temporary period of time in a fibre-integrated optical cavity and then recall the quantum state of light and quantum information at a later time with a high probability of success. The present invention uses a nonlinear optical switching mechanism to modify at least one property of the quantum light, or cavity, to trap the quantum light in the optical cavity. Subsequent application of the nonlinear optical switching mechanism switches at least one property of the stored quantum light, or cavity, to release the quantum light from the optical cavity. The present invention also provides quasi-deterministic single-photon generation by temporal multiplexing of a photon pair source integrated within the cavity.

The present disclosure relates to a device and a method for adjusting a pulse width of a laser beam by using the plasma generated by being induced from laser as a shutter, and more particularly, to a device and a method for adjusting a laser pulse width, which can precisely and quickly adjust the laser pulse width by dividing the laser generated from a laser light source into a target pulse and a shutter pulse; converting the optical path of the divided laser; and chopping the target pulse by using the plasma induced from the shutter pulse as an optical shutter in a cell having adjustable internal pressure.

Methods, systems, and apparatus for generating Kerr frequency combs. The system includes a continuous-wave pump laser to provide a master comb pump. The system includes a microresonator that generates a master Kerr frequency comb using the master comb pump. The system includes a splitter that splits the master Kerr frequency comb into multiple CW comb lines including a first comb line used to transmit a data signal and a second comb line used as a slave comb pump. The system includes a combiner that is configured to combine the first comb line and the second comb line to produce a combination of a data channel and CW comb line. The system includes a second demultiplexer that extracts the second comb line that is used as the slave comb pump. The system includes another microresonator that uses the second comb line and generates a slave Kerr frequency comb.