Saturated absorption composite material ink, preparation method and optical fiber laser based on ink

Abstract

The invention discloses a saturated absorption composite material ink, a preparation method and an optical fiber laser based on the ink. Two or more lower-dimension quantum materials with saturated absorption characteristics and a surfactant are dissolved in water so as to prepare a dispersion liquid; a water-soluble polymer is prepared into a water solution; and the two solutions are mixed up and subjected to ultrasonic treatment so as to form the saturated absorption composite material ink with the appointed optical absorption characteristic. The invention further provides a method for depositing the composite material ink on optical fiber laser elements through an ink-jet printing device or a spraying device so as to realize mold locking or Q laser pulse. By utilizing the saturated absorption composite material ink, saturated absorption devices with flexible and controllable optical parameters, high damage threshold and good integration level are realized; and by utilizing the devices, the working reliability and the output power stability of optical fiber lasers are greatly improved, the laser design is simplified, and the cost is saved.

Description

technical field [0001] The invention belongs to the field of laser and optoelectronic devices, and relates to a saturable absorption composite material ink, a preparation method and a fiber laser based on the ink. Background technique [0002] Pulse refers to a working method that occurs only once at a certain interval. A laser that operates in pulsed mode is a pulsed laser. This type of laser has high pulse energy and good cutting quality. It is a high-end product in processing laser products. In recent years, it has been widely used in optical communication systems, photoelectric sensors, biomedicine, and precision machining. There are generally two ways to realize laser pulses: mode locking and Q switching. [0003] Mode-locked lasers are a general term for lasers whose output light pulse width is on the order of picoseconds or shorter (1 picosecond = 10 -12 seconds), with the characteristics of high peak power and high time sensitivity. Compared with mode-locked lase...

AI Technical Summary

Problems solved by technology

For example, devices prepared by solid powder spraying often lead to the formation of nanomaterials with a size on the order of the operating wavelength of the laser or larger aggregates. At the same time, it is easier to cause optical damage to the device, which limits the output power, stability and service life of the laser

Dispersing the material into a polymer or glass matrix to form a solid-state thin-film device can reduce the influence of aggregates, but since the prepared saturable absorber is an independent optical component, it needs optical glue to couple with other components in the laser, or through A group of optical lenses and other components are completed, and the relative displacement between these components has brought great limitations to the reliability and design flexibility of the laser.

More importantly, the reported low-dimensional quantum material saturable absorbing devices only contain one kind of saturable absorbing material, so the parameters of its nonlinear absorption, such as recovery time, modulation depth (at low input power and high input power , the change in light transmittance of the device) is usually determined by the intrinsic optical properties of the single saturable absorbing material, so it cannot be flexibly controlled, severely limiting the parameter optimization range of pulsed lasers based on these devices

Images