38 results about "Ti:sapphire laser" patented technology

The invention discloses a polarized dual-wavelength fiber ultrashort pulse laser. The structure of the ultrashort pulse laser adopts polarization-preserving or common rare earth doped fiber as a laser gain dielectric, and utilizes a polarized beam splitter to split light, a broadband chirped fiber grating as a cavity surface reflecting element and a dispersive compensation element and a semi-conductor saturable absorption body as a mode locking element, to generate a fiber laser with high repetition frequency, high power, simple structure and high efficiency, which is a laser realizing the full fiber dual-wavelength mode locking fiber ultrashort laser pulse output. The ultrashort pulse laser has output of picosecond and femtosecond light impulse length polarized laser, with the wavelengthof more than 1 micrometer; the laser, after being amplified by a high-power dual-wavelength fiber amplifier, can be used for substituting a two-color wavelength mode locking titanium sapphire laser and a two-color wavelength mode locking titanium sapphire amplifier with large volume, complex operation and low efficiency, for utilizing beat frequency to generate a mid-infrared ultrashort pulse laser with the wavelength of about 15 micrometers and for pump-detection ultrafast optical physics experiments of a molecular system or environmental monitoring and detection of microwave photonics and biophysics and the like.

The invention provides a continuously tunable single-frequency Ti sapphire laser device. The continuously tunable single-frequency Ti sapphire laser device comprises a pump source (3), a Ti sapphire crystal (2), a laser resonant cavity, an isolator, a double-refraction filter (4), an etalon (5) and piezoelectric ceramic (14), wherein a nonlinear crystal (1) is inserted between a third flat concave mirror (11) and a fourth flat concave mirror (12) forming the laser resonant cavity, the nonlinear crystal (1) is an optical crystal machined to be provided with two unparallel light through surfaces or an optical crystal placed in a light path at a Brewster angle; moreover, the nonlinear crystal (1) is used for realizing generation of second harmonics of the base-frequency light of the laser device in a mode of critical phase matching or noncritical phase matching. According to the continuously tunable single-frequency Ti sapphire laser device provided by the invention, the nonlinear loss stressed by the main oscillation mode of the base-frequency light is one half of a non-oscillation mode, thus the oscillation starting of the non-oscillation mode of the base-frequency light is effectively suppressed, and the laser device realizes continuously tunable property for the frequency in a valid gain bandwidth. The laser device is compact in structure and convenient to operate.

The invention discloses a Kerr lens mode-locked Ti:sapphire laser pumped by a semiconductor laser, comprising: a first semiconductor laser for emitting continuous laser light in the blue-green band to pump a Ti:sapphire crystal in a resonant cavity; It is used to oscillate and mode-lock the laser in the near-infrared band to output the femtosecond pulse laser; the interferometer makes the femtosecond pulse laser generate a beat frequency signal to obtain the carrier envelope offset frequency; the feedback adjustment unit is used to adjust the front and rear positions of the resonator end mirror and inclination, as well as the output laser power of the semiconductor laser, so as to keep the repetition frequency and carrier envelope offset frequency stable. The invention can output ultra-short laser pulses with stable repetition frequency and carrier envelope offset frequency, and directly uses semiconductor lasers as pumping sources, which greatly reduces the cost of the laser and further reduces the volume of the entire laser.

The invention relates to the field of optical phase-locked loops and provides a 10MHz-10GHz optical phase-locked loop device. The device includes a titanium-doped sapphire laser (1), a semiconductor laser (2), a high-bandwidth photoelectric detector (3), a radio frequency power beam splitter (4), a spectrum analyzer (5), a high-frequency signal generator (6), a frequency mixer (7), a radio frequency power amplifier (8), a signal generator (9), an optical phase-locked loop module (10), and an oscilloscope (11). The device can make the frequency difference between the two lasers fixed in the range of 10MHz to10GHz, and the device can stably and continually work and is less affected by the external environment.

The invention provides a titanium sapphire laser amplifier, which comprises a pumping laser, a titanium sapphire crystal, a multi-path amplifier, a laser seed source and a synchronous time delay. The titanium sapphire laser amplifier is characterized in that a pumping light half wave plate is added into an output light path of the pumping laser, and a pumping light quarter wave plate and a pumping light reflecting mirror are sequentially added into a transmission light path of the titanium sapphire crystal. The titanium sapphire laser amplifier has the advantages that the transverse gain of the titanium sapphire crystal can be effectively reduced, so the parasitic oscillation of the titanium sapphire is well inhibited, in addition, the absorption rate of the titanium sapphire crystal on the pumping light can be improved, and the seed light amplification efficiency is improved. The titanium sapphire laser amplifier has the characteristics that the regulation is convenient, simplicity and high efficiency are realized, and the practicability is high.

The invention provides a device and method for preparing a two-component continuous variable high-order orbital angular momentum entanglement state, including a titanium sapphire laser, a mirror, an optical beam splitter, a half-wave plate, an electro-optical modulator, and a high-frequency signal generator , filter, lens group, Glan laser prism, cesium atom pool, Glan Thomson prism, beam collector, balanced zero-beat detector, adder and subtractor, spectrum analyzer. The device of the invention can obtain a continuous variable high-order orbital angular momentum entanglement state with a maximum entanglement degree of -3.8dB, and the device has stable performance and compact structure, and can realize commercial production. Cesium atom D 1 The line transition frequency corresponds to the quantum dot exciton emission region of indium arsenide, and the one produced by the present invention corresponds to the cesium atom D 1 The two-component continuous variable high-order orbital angular momentum entangled state light source with linear transition frequency can be used in the fields of coherent interface research and quantum precision measurement based on atoms and solid-state systems.