Application of Femtosecond laser pointer in the Field of Microfluidic Chip Processing
Introduction of microfluidic chip:
Usually the fluid flowing in the micron-scale space is called microfluid, and the operation of microfluid with laminar flow as the main feature is called microfluidics. The microfluidic chip is a technology for precise control of fluids at the micrometer, hundred micrometer or even millimeter scale. It has the ability to integrate some basic functional units of biology, chemistry, medicine, optics, physics, mechanics and other laboratories into a small area chip.
Application of microfluidic chip technology:
Cell analysis
Clinical testing
Chemical analysis
Synthetic field
Optical fluid field
Advantages of microfluidic chip technology:
Microfluidic chips have some advantages that traditional experimental methods do not have, such as: ultra-low reagent consumption, high integration, high automation, high efficiency, environmental friendliness, miniaturization, easy portability, low cost, and simple operation.
Microfluidic chip processing:
The commonly used methods for microfluidic chip processing include photolithography and transfer, hot pressing, injection molding, nanoimprinting, and 3D printing technology. However, for some tiny and complex microstructures, the above methods are not the first choice. Femtosecond laser two-photon processing has begun to enter people's field of vision with its unique advantages.
Its main advantages are:
Direct write processing, no mask required, greatly reducing process complexity
True 3D machining
High processing resolution
Diverse processing materials
Femtosecond light source recommendation:
Femtosecond laser two-photon processing continues to win the favor of microfluidic researchers with its unique advantages. How to obtain a cost-effective femtosecond light source is the focus of the workers' consideration. Because the probability of two-photon absorption is positively correlated with the square of the energy of the incident light, this means that only enough energy can produce two-photon excitation, so there are higher requirements for the green laser pointer's power, pulse width, repetition frequency and other parameters. Aiming at the application needs of this direction, the laser has launched an ultra-fast mode-locked fiber laser. Its average output power reaches the watt level, the pulse width is less than 300fs, and the repetition frequency is as high as MHz. Its optical path and circuit structure are highly integrated, compact and portable, and convenient for users to realize The miniaturization of the system perfectly meets the needs of scientific research users in the field of microfluidics.