## 1 Introduction  
The development of thin-film optoelectronic devices mainly depends on the achievements of materials science in the development of nanomaterials. These materials should have low electrical resistance characteristics combined with excellent flexibility, low weight, and, preferably, being manufactured by a simple and cost-effective method. Carbon nanotube (CNT) film is made of a coaxial tubular carbon molecular structure--carbon nanotubes [1] are one of those meet these requirements. They have been extensively exploited for a wide range of applications such as electron field emitters and flexible electronic devices. For example, they is used as a flexible device material and an energy-absorbing layer [2]. Due to the high elasticity and compressibility of CNT film, its original length is restored after their load is released, and their compression and recovery are repeated without cracking. Transparent single-walled carbon nanotube (SWCNT) film has high conductivity, and excellent flexibility can be regarded as an ideal alternative material which to indium tin oxide in electroluminescent devices and flexible electronic components [3]. CNT film can be used to make a supercapacitor because of their excellent flexibility, lightweight and corrosion resistance [4]. With the absorption characteristics of photons and the high power conversion efficiency of CNT film, significant progress has been made in solar cells [5] and thin-film transistors [6] applied to photosensitive LED (Light Emitting Diode) circuits. CNT film can also be used for thermal management materials applied in wearable electronics [7]. Flexible printed CNT film can be used as a transistor because of its physical stability, high carrier mobility and excellent mechanical flexibility. However, it is still a challenge to achieve high-performance with printed SWCNT film transistors with excellent mechanical flexibility [6]. How to efficiently and accurately make CNT film materials into specified sizes and structures is one of the constraints of the application and development of CNT film. At present, cutting methods include liquid-phase oxidation cutting, mechanical cutting, electron-beam-induced cutting and laser cutting [8], but these cutting methods have certain drawbacks. The liquid-phase oxidation cutting method will produce a large amount of material loss to CNT film. The surface of the material is concave at the cutting point due to mechanical stress in the mechanical cutting, resulting in uneven surface quality. Electron-beam-induced cutting can achieve a high cutting precision, but severe cutting conditions, complicated equipment, and high cost restrict the mass production of CNT film. Compared with these process, laser direct cutting has several advantages, such as non-contact, maskless, and high precision processes. There have been several investigations about the laser cutting of CNT film. A laser can be used to pattern source/drain electrodes after fabricating source-drain electrodes using printable CNT ink which can reduce the overall cost of printed electronic devices. [PERSON] et al. [8] reported that nanosecond laser cut CNT film can achieve a micron-scale processing size, but amorphous carbon is produced around the edge and ablated line, which affects the mechanical properties of CNT film. [PERSON] et al. [9] used a picosecond pulsed laser with an energy close to the ablation threshold to ablate CNT film. Their results showed that an ultrafast pulsed laser induces the two-photon nonlinear oxidation of carbon-carbon bonds. P-type doping on the surface of the material makes the intensity of G band increase and shift to slightly lower wavenumbers in Raman spectroscopy. A multi-beam interference nanosecond laser can be used to ablate CNT film deposited on a glass substrate, as the width of the ablation region increases as the laser energy increases and the position at the maximum laser interference causes defects [10].