36 results about "Holmium laser" patented technology

Described herein are a device and a method for the treatment of varicose veins via laser radiation, and in particular using a holmium laser. The radiation of a laser source (5) is injected in a fiber (3) that can be inserted in the vessel to be treated. The laser source emits a radiation such as to cause a hyalinizing sclerosis with structural modifications both to the fibers of the collagen (shrinkage) and to the extracellular matrix of the median coat of the vein by the photothermal effect, substantially without thermal stress of the morphological component of the tunica media and of the tunica intima.

The invention relates to a urological surgical medical device, in particular to an attractive ureteroscope. An influent and holmium laser fiber channel is a cavity shared by the influent and holmium laser fibers during a surgery. An effluent and instrument channel penetrates the entire novel ureteroscope and is a cavity shared by the negative pressure effluent and instruments. An effluent and instrument channel joint is arranged on the rear portion in the ureteroscope, and the outer end of the effluent and instrument channel joint is provided with effluent and instrument channel joint threads.A sleeve of the effluent and instrument channel is arranged behind the effluent and instrument channel. The ureteroscope can accelerate the intraoperative drainage speed without affecting the surgical operation to form continuous water circulation in the surgical field, which can not only maintain the good definition of the visual field during the surgery, but also significantly improve the surgical lithotripsy efficiency. Further, the renal pelvis and ureteral pressure can be reduced to prevent postoperative bacteremia and urinary septicopyemia.

A medical device includes a sheath defining a lumen, an elongate member disposed within the lumen, and a basket connected to a distal end of the elongate member and being retractable within and extendable from the lumen. The basket includes a plurality of legs. At least one leg of the plurality of legs includes a material that is substantially resistant to Holmium laser energy.

The invention provides a holmium laser therapeutic instrument used for treating a treatment object in a human body. The holmium laser therapeutic instrument comprises a holmium laser, an output optical fiber and a detection and treatment device, wherein the holmium laser is used for emitting laser; the output optical fiber is connected with the holmium laser and used for transmitting laser produced by the holmium laser; the detection and treatment device is located at the tail end of the output optical fiber, is used for detecting components and density or hardness of the treatment object, and is further used for treating the treatment object. By means of the detection and treatment device, the components and density or hardness information of the treatment object are acquired, output power of the holmium laser is set according to the components and the density or hardness information of the treatment object, setting of the output power of the holmium laser is enabled to be quantitative, so that the damage to healthy tissue in a treatment process is reduced, and the use effect and the safety of the holmium laser therapeutic instrument are improved.

The invention discloses a holmium laser ultrasonic comprehensive lithotripsy treatment system. The system comprises a holmium laser lithotripsy module and an ultrasonic lithotripsy module, wherein the holmium laser lithotripsy module and the ultrasonic lithotripsy module are respectively connected with and controlled by a touch screen controlling system; the holmium laser lithotripsy module outputs nanosecond grade lasers through optical fibers and comprises a cooling system, a laser device module and a laser power supply, and the cooling system and the laser power supply are respectively connected with the laser device module; and the ultrasonic lithotripsy module outputs ultrasonic waves through a probe and comprises a negative pressure suction module and an ultrasound generating module, and the negative pressure suction module is connected with the ultrasound generating module. According to the holmium laser ultrasonic comprehensive lithotripsy treatment system, the holmium laser lithotripsy and the ultrasonic lithotripsy are combined effectively, the operation is simple and convenient, the cost is reduced, and simultaneously, various lithotripsy diseases can be cured efficiently and rapidly.

The invention provides a stone crushing and clearing all-in-one machine. The stone crushing and clearing all-in-one machine comprises three energy output ports, namely, an ultrasonic output interface, a pneumatic output interface and a holmium laser output interface respectively. During treatment, stone crushing measures can be flexibly selected as required. Moreover, a stone clearing device accommodating assembly which comprises a support lug I and a telescopic bracket is provided; the support lug I is used for accommodating a collecting bottle; the telescopic bracket is used for accommodating negative-pressure suction equipment. Stone clearing equipment and stone crushing equipment are arranged and placed neatly and orderly.

The invention provides an integrated calculus crushing and removing machine convenient and fast to use. The integrated calculus crushing and removing machine convenient and fast to use comprises three energy output ports which are the ultrasonic output interface, the air pressure output interface and the holmium laser output port respectively, and therefore in the treatment process, the calculus crushing methods can be flexibly selected according to needs. The integrated calculus crushing and removing machine comprises an accessory containing assembly which comprises a first supporting lug, a second supporting lug and an optical fiber storage device, wherein the first supporting lug is used for containing a collecting bottle, the second supporting lug is used for containing an ultrasonic handle and an air pressure ballistic handle, the optical fiber storage device is used for containing optical fibers, all the parts can be placed at the proper positions orderly, and the integrated calculus crushing and removing machine can be conveniently used when needing to be used.

The invention provides an ureteroscope with a temperature sensor and belongs to the field of medical apparatuses and instruments. The ureteroscope comprises a mirror of a handheld portion and a mirrorbody connected to the mirror, wherein a temperature sensor probe is arranged at the front end of the mirror body and is connected with a wiring post on the mirror through a wire, and the wiring postis connected with a temperature sensor processing unit through a connecting wire. The temperature sensor processing unit is connected with a displayer capable of displaying temperature at the probe inreal time. The temperature sensor processing unit is also connected with a relay, and the relay is serially connected between a holmium laser mainframe and a pedal switch. When the local temperaturein the ureter exceeds a set value in the laser lithotripsy process, the relay is disconnected, even if an operator still treads the pedal switch at the moment, holmium laser also does not work, the relay is turned on when the local temperature in the ureter is reduced to a normal range, and holmium laser can continue to work by treading the pedal switch. Therefore, complications such as postoperative ureterostenosis caused by local thermal injuries of the ureter can be prevented in the laser lithotripsy process.

The invention discloses a four-core holmium laser generation system. The system comprises a coupling lens, four groups of holmium laser resonant cavities, total reflection mirrors and a servo motor, and is characterized in that: the four groups of the holmium laser resonant cavities are parallel to each other to form a square and are respectively positioned at the four corners of the square; the total reflection mirrors can rotate according to the transmitting order of the four groups of the holmium laser resonant cavities under the control of the servo motor; and the laser light generated by the holmium laser resonant cavities is output, the laser light is reflected to the coupling lens by the total reflection mirrors controlled by the servo motor and is output through an optical fiber. Each group of the holmium laser resonant cavities is provided with two total reflection mirrors in a group; and the four groups of the holmium laser resonant cavities share a parallel circulating water cooling system for cooling. The four-core holmium laser generation system has a simple structure, is easy to realize and very simple to install and adjust, improves service efficiency and reduces cost.

Described herein are a device and a method for the treatment of varicose veins via laser radiation, and in particular using a holmium laser. The radiation of a laser source ( 5 ) is injected in a fiber ( 3 ) that can be inserted in the vessel to be treated. The laser source emits a radiation such as to cause a hyalinizing sclerosis with structural modifications both to the fibers of the collagen (shrinkage) and to the extracellular matrix of the median coat of the vein by the photothermal effect, substantially without thermal stress of the morphological component of the tunica media and of the tunica intima.

The invention discloses a protective lens for a laser coupling mirror of a medical holmium laser therapeutic apparatus. The protective lens comprises a lens body, wherein the lens body is placed between a coupling mirror and an optical fiber; the thickness of a lens per se is only 1mm; an anti-reflection film is plated on the light beam incident surface of the lens; laser basically has no energy loss after passing through the lens; and in the situation that the optical fiber is damaged because of unexpected situations, sputtered impurities are unlikely to adhere to the coupling lens to damage the coupling lens so that the coupling lens is protected. When the optical fiber is damaged because of the unexpected situations, only the optical fiber and the protective lens need replacing without replacing the coupling lens.

The invention relates to medical instruments and discloses an upper urinary tract complex lesion percutaneous flexible ureteroscope operation to solve the problems that a flexible tube of an existing ureter device is prone to being left in a lower section of a ureter, a pump line is prone to disengaging, and consequently, body irrigation fluid leaks. According to the upper urinary tract complex lesion percutaneous flexible ureteroscope operation, a percutaneous puncturing and expanding device, a ureteroscope, a cold light source, a camera system, a bedside B ultrasonic machine, an intracavity calculus removing instrument, a high-pressure sacculus expander, a pressure adjusting water-delivery pump and a holmium laser ureteroscope are adopted. The ureteroscope comprises a sheathing canal, a flexible tube located in the sheathing canal, a push tube used for connecting the sheathing canal with the flexible tube, a handheld part located at the tail end of the sheathing canal and a washing valve. By means of the rotationally-combined sheathing canal and flexible tube, the ureteroscope is more suitable for being applied to complex kidney stone operations.

A system and method for detecting relative location of a surgical laser fiber tip relative to a surgical laser target during a surgical laser procedure utilizes a spectrophotometer to detect radiation indicative of the relative location. For example, the detected radiation may indicate contact between the fiber tip and a stone being subjected to laser lithotripsy, so as to prompt the surgeon to withdraw the fiber tip from the stone and / or take other action to limit contact-induced erosion of the fiber tip, and to avoid saturation of the endoscope camera resulting from the flash that occurs following contact. In addition, the absence of any detected radiation by the spectrophotometer may be used to indicate that the stone is no longer present, or that the fiber tip is no longer aimed at the stone, prompting the operator to reposition the fiber and / or temporarily cease firing of the laser. The main surgical laser may be a pulsed Holmium laser, which is delivered to the target through the optical fiber together with a pulsed 532 nm aiming beam.

The invention discloses an adjustment method of a double path holmium laser. The adjustment method of the double path holmium laser solves the problems that only a collimated light beam is used to adjust a first resonant cavity, and then two isosceles rectangular prisms are used to deflect the collimated light beam by 90 degrees, and therefore the collimated light beam is horizontally moved relatively to an original transmission direction. According to the adjustment method of the double path holmium laser, two 45 degree total reflective mirrors are used to sequentially replace the two isosceles rectangular prisms, and therefore the effect that the two total reflective mirrors are efficiently and accurately positioned is guaranteed. The collimated light beam after being reflected by the two total reflective mirrors is parallel to the original transmission direction, and then the optical axis of a second resonant cavity, adjusted by using the collimated light beam, is naturally parallel to the optical axis of the first resonant cavity, and furthermore laser light generated by the second resonant cavity sequentially passes through light paths formed after the two total reflective mirrors are deflected, and then overlaps with an extension line of the optical axis of the first resonant cavity, and therefore the adjustment method of the double path holmium laser guarantees that two paths of the laser light can be coupled into the same transmission optical fiber at the minimum loss when the two paths of the laser light work. The adjustment method of the double path holmium laser can achieve the purpose of efficiently and reliably adjusting a double path laser system, reduces demands for operation personnel, improves production efficiency, and reduces production cost.

The invention discloses an improved reclining lithotomy position percutaneous nephrolithotomy, which relates to medical instruments. The existing percutaneous nephroscopic surgery needs to change the surgical position, which leads to prolonged operation time, increased anesthesia risk, and labor intensity of medical staff. increase and decrease patient comfort. It includes the operating table, a set of percutaneous puncture and dilation equipment, ureteroscope, percutaneous nephroscope, cold light source, camera system, bedside B-ultrasound machine, intracavitary stone removal equipment, pressure-regulating water pump, and holmium laser.

The invention discloses a holmium laser and semiconductor laser cooperative prostate laser treatment system, comprising an optical fiber beam combiner, wherein the optical fiber beam combiner is provided with a first input optical fiber, a second input optical fiber and an output optical fiber; the first input optical fiber is connected with a holmium laser; the holmium laser is connected with a first control pedal for controlling work of the holmium laser; the second input optical fiber is connected with a semiconductor laser; the semiconductor laser is connected with a second control pedal for controlling work of the semiconductor laser; the output optical fiber is connected with an external optical fiber; and the other end of the external optical fiber is guided into an endoscope. According to the holmium laser and semiconductor laser cooperative prostate laser treatment system provided by the invention, a doctor can select more suitable laser from the holmium laser and the semiconductor laser conveniently, quickly and repeatedly to perform prostatic hyperplasia treatment; the doctor can fulfill the operation purpose better and faster; and the surgical risk of a patient is reduced and the optimal treatment effect is achieved.

The invention discloses a holmium laser medical instrument which comprises a laser assembly. The laser assembly comprises a laser power supply and a holmium laser, the laser power supply comprises a power supply and a time adjusting module, the time adjusting module, the power supply and the holmium laser are sequentially connected, and the time adjusting module is used for controlling output of the holmium laser. According to the holmium laser medical instrument, the time adjusting module is arranged in the laser power supply, and discharging time of the laser power supply is adjusted according to the time adjusting module, so that the laser power supply conducts secondary discharging in a short interval time after first time discharging, the holmium laser continuously outputs two single-pulse laser rays in a short time, the two single-pulse laser rays are multiplied to form a double-pulse laser ray to be output, the holmium laser can output the double-pulse laser ray, and the aim of outputting energy of the holmium laser is achieved. The holmium laser medical instrument can achieve double-pulse output of the holmium laser through a single circuit, so that the holmium laser medical instrument is simple in structure and convenient to operate and shortens treatment time of an operation.

The invention discloses holmium laser stone cleaning and crushing equipment. The equipment comprises a supporting plate, telescopic supporting columns are arranged below the supporting plate, the telescopic supporting columns comprise vertical telescopic tooth plates, winding boxes are arranged on the tops of the vertical telescopic tooth plates, horizontal rotating rods are arranged on the vertical telescopic tooth plates, rotating gears are arranged on the horizontal rotating rods, the rotating gears are movably toothed to the vertical telescopic tooth plates, one ends of the horizontal rotating rods are provided with rotating handles, a connecting rod is arranged on the telescopic supporting columns, the connecting rod is fixedly connected with the horizontal rotating rods, and a holmium laser generator is arranged above the supporting plate. The equipment has the advantages that a lifting and lowering adjustment rod is used for lifting and lowering adjustment, a horizontal supporting rod is used for horizontal adjustment, and the telescopic supporting columns can be adjusted according to different requirements; in addition, the stone crushing is carried out by a holmium laser stone crushing rod, the quickness of operation is improved, the stability and safety of the operation are improved, and the work efficiency is improved.

The present invention discloses a three-way holmium laser. The three-way holmium laser comprises a case, the case is internally provided with a fixed plate, a first holmium laser resonant cavity, a second holmium laser resonant cavity and a third holmium laser resonant cavity penetrate the fixed plate, one sides of the first holmium laser resonant cavity, the second holmium laser resonant cavity and the third holmium laser resonant cavity are respectively provided with output mirrors, a rotating plate is arranged at the outer walls of the output mirrors, and the output mirrors penetrate the rotating plate and are extended to one side of the rotating plate. The three-way holmium laser is provided with the first holmium laser resonant cavity, the second holmium laser resonant cavity and thethird holmium laser resonant cavity to facilitate generating lasers after powering on to achieve gathering of the lasers, is provided with a collecting lens to facilitate gathering parallel lasers toachieve a laser gathering effect, and is provided with a slide rod to facilitate sliding the slide rod at the inner wall of the case to control a distance between the collecting lens and the rotatingplate, and therefore an effect of controlling the size of the lasers can be achieved.

The invention discloses a holmium laser system with high peak power. The system comprises a total reflector, a laser gain medium, a pumped source, a polarizer, an electric light Q-modulated crystal and an output lens; and the electric light Q-modulated crystal is a La3Ga5SiO14 crystal with a special doping proportion of MgO, and the initial ratio of raw materials of the crystal is MgO=3.3-3.9 mol%, La2O3=31.8-32.1 mol%, Ga2O3=53.7-53.9 mol%, and SiO2=10.6-10.7 mol%. Thus, the problem that the electric light Q-modulated crystal is low in the damage threshold in the mid ir waveband at present, and nanosecond level laser output with high peak power is realized.

The invention relates to a urethral lithotripsy device with a soft channel. The urethral lithotripsy device comprises a soft channel device, a light guide assembly, a draw bar assembly, a lifter, a soft lens assembly and a holmium laser assembly. The soft channel device comprises a channel seat and a soft tube channel, one end of the soft tube channel is fixed onto the channel seat, a channel head is arranged at the other end of the soft tube channel, a channel opening is formed in the channel head, and a transparent sheet is fixed onto the channel opening; a soft steel wire is arranged in the soft tube channel, one end of the soft steel wire is fixed onto the channel seat, and a distance from the other end of the soft steel wire to the channel opening ranges from 4cm to 5cm; the holmium laser assembly, a soft lens channel, a light guide cable channel and a draw bar channel are arranged in the soft tube channel. The urethral lithotripsy device has the advantages that the urethral lithotripsy device is reasonable in structural design, the soft tube channel is soft and is easy to operate, and accordingly pain can be prevented for patients; the urethral lithotripsy device is wide in operation visual field, various directions can be taken into consideration, and accordingly the surgery efficiency can be improved.

A laser fiber guiding and water absorption tube used for a nephroscope comprises a tube body and is characterized in that two connectors are connected at one end of the tube body, the two connectors include an optical fiber connector and a water absorption connector, a sealing cap II is installed on the optical fiber connector, and a rubber tube and a controlling clip are installed on the water absorption connector. The laser fiber guiding and water absorption tube used for the nephroscope has the advantages of being an auxiliary instrument special for treatment of holmium laser lithotripsy with a percutaneous nephroscope, being capable of conducting flushing, lithotripsy and suction at the same time, increasing intelligibility of the treatment of the holmium laser lithotripsy with the percutaneous nephroscope, and being accurate in locating treatment, high in treatment speed, high in safety and few in complication.

The invention provides a solid single-laser dual-wavelength pumping optical difference frequency terahertz wave generating device. The generating device comprises a single laser based on double-dopedholmium and thulium ions used for outputting a dual-wavelength pumping source, wherein the dual-wavelength pumping source is holmium laser and thulium laser based on the strongest intrinsic radiationwavelength of double-doped holmium and thulium ions, and output is generated by holmium and thulium ion energy correlation transfer saturation amplification; a holmium and thulium laser beam shaper for changing the sizes of light spots of the holmium laser and the thulium laser to obtain a shaped dual-wavelength pumping source; an optical difference frequency device used for generating terahertz waves by utilizing the shaped dual-wavelength pumping source in the optical difference frequency conversion process; and a terahertz wave screener for filtering the residual dual-wavelength pumping source after the optical difference frequency conversion process is finished to obtain the terahertz wave. The solid single-laser dual-wavelength pumping optical difference frequency terahertz wave generating device disclosed by the invention can simultaneously meet the requirements of simple and compact structure, good stability and high power.

The invention discloses a holmium-thulium laser therapeutic instrument and an adjustment method thereof. The holmium-thulium laser therapeutic instrument comprises a box which is internally provided with a first support plate and a second support plate. A holmium-thulium lase assembly is arranged on the second support plate. The holmium-thulium laser assembly concretely comprises a holmium laser emitting module and a thulium laser emitting module. The holmium laser emitting module and the thulium laser emitting module are both provided with a connector at one end. An output optical fiber is connected on one end of the connector located outside the box. A power supply assembly is arranged on one side of the inner surface of the lower end of the box. A power supply connector is connected onthe power supply assembly. The upper surface of the first support plate is provided with a central control module. A control panel is embedded in the outer surface of the upper end side of the box. The outer side surface of the control panel is concretely provided with a display screen and a manual adjusting switch. The power supply assembly, the holmium-thulium laser assembly and the central control module are connected with each other through leads. The holmium-thulium laser therapeutic instrument is simple in operation and convenient to use and is favorable for use.

The invention provides a novel holmium laser comprises a total reflective mirror, a light-gathering cavity and a semi-reflective mirror. The light-gathering cavity comprises a housing, a diffuse reflection body, a holmium laser crystal rod and a pulse xenon lamp. End surfaces on two ends of the holmium laser crystal rod are concave. The semi-reflective mirror is in a meniscus shape, and the surface close to the light-gathering cavity is a concave surface. Holmium laser spots emitted from a resonant cavity formed by the total reflective mirror, the holmium laser crystal rod and the semi-reflective mirror is relatively small in divergence angle and more circular in laser spot cross section, so that the focused laser spots are smaller and can be focused into a thinner optical fiber.

The invention discloses a holmium laser optical fiber guide device and a treating device provided with a resectoscope and the guide device, and relates to the field of medical supplies. The holmium laser optical fiber guide device comprises a flexible guide pipe and a guide device head which is connected to one end of the guide pipe, the guide pipe is internally provided with an optical fiber hole, a cavity which is communicated with the optical fiber hole is formed in the guide device head, and a flexible sealing cap covers the guide device head. The treating device provided with the resectoscope and the guide device comprises the resectoscope, the resectoscope comprises an electroexcision ring pipe and an operating handle connector provided with a sealing part, the electroexcision ring pipe is internally provided with an electroexcision ring hole, the operating handle connector is internally provided with an electroexcision ring inlet hole, and the sealing part is internally providedwith a sealing part hole which is communicated with the electroexcision ring inlet hole. The treating device further comprises the holmium laser optical fiber guide device, the guide pipe penetratesthrough the sealing part hole, the electroexcision ring inlet hole and the electroexcision ring hole, the guide pipe and the sealing part are sealed, and the guide device head is located at the outerside of the operating handle connector. The holmium laser optical fiber guide device and the treating device provided with the resectoscope and the guide device are applicable to bladder intracavity lithoclasty or urethra stenosis holmium laser incision.

The invention discloses a hollow fiber sleeve for protecting a medical endoscope from holmium laser damage and an application of the sleeve. The hollow fiber sleeve is obtained by spinning the spinning dope; the spinning dope consists of the following components in parts by mass: 100 parts of N, N-dimethylformamide, 20-40 parts of thermoplastic polyurethane, 2-4 parts of antioxidants, 2-4 parts of defoaming agents, 5-10 parts of hydrotalcite and 4-8 parts of SiO2 hollow microspheres. The hollow fiber sleeve can effectively protect the blasting energy and heat energy generated after the holmium laser contacts water, can effectively prevent the medical endoscope pipeline from being damaged due to misoperation in the use process, and prolongs the service life of the medical endoscope, thereby increasing the continuous use time of the endoscope and furthest reducing the maintenance times of the endoscope.

The invention discloses a holmium laser ultrasonic comprehensive lithotripsy treatment system. The system comprises a holmium laser lithotripsy module and an ultrasonic lithotripsy module, wherein the holmium laser lithotripsy module and the ultrasonic lithotripsy module are respectively connected with and controlled by a touch screen controlling system; the holmium laser lithotripsy module outputs nanosecond grade lasers through optical fibers and comprises a cooling system, a laser device module and a laser power supply, and the cooling system and the laser power supply are respectively connected with the laser device module; and the ultrasonic lithotripsy module outputs ultrasonic waves through a probe and comprises a negative pressure suction module and an ultrasound generating module, and the negative pressure suction module is connected with the ultrasound generating module. According to the holmium laser ultrasonic comprehensive lithotripsy treatment system, the holmium laser lithotripsy and the ultrasonic lithotripsy are combined effectively, the operation is simple and convenient, the cost is reduced, and simultaneously, various lithotripsy diseases can be cured efficiently and rapidly.

The invention discloses a packaging structure applied to an optical fiber of a holmium laser therapeutic instrument. The packaging structure comprises a nylon base film, a nylon face film is fixedly connected to the lower side edge of the nylon base film, an n-shaped first convex strip is fixed to the side edge of the nylon face film, a second convex strip opposite to a first sealing strip is fixed to the nylon base film, and convex edges and grooves are formed on the second convex strip and the first convex strip correspondingly. A rectangular transparent sheet is fixed to the inner side faceof the nylon face film through mucilage glue, a round hole is formed in the center of the transparent sheet, and a plurality of upwarped blocking sheets are formed on the inner ring of the round holeof the transparent sheet. A strip-shaped support sheet is arranged at the center of the transparent sheet, the two ends of the support sheet are formed on the side edge of the round hole, and a plurality of triangular buckle sheets raised upward are formed on the support sheet. According to the packaging structure applied to the optical fiber of the holmium laser therapeutic instrument, the optical fiber is placed and positioned conveniently and packaged in a sealed mode, and reuse of the optical fiber is facilitated.

The invention discloses a laser fiber core diameter intelligent identification device. The device mainly comprises an infrared luminous receiving module, an optical signal reflecting board, a single-chip microcomputer processor and the like. As the holmium laser therapy apparatus adopts the energy of optical fibre transmission to treat lesions, with the continuous development of the technology ofthe holmium laser therapy apparatus, large power holmium laser therapy apparatus appears; as the therapy apparatuses with different powers require of being provided with optical fibre with different core diameters, an optical fiber core diameter intelligent identification system is required to identify the core diameter of optical fiber and control the output power of the laser therapy apparatus,thus the optical fibre can not be damaged accidentally. As the identification device adopts the new technology, the core diameter of optical fibre can be identified intellectually, the transmission power of the optical fiber with different core diameters can be controlled and the situation that optical fiber is damaged caused by inputting large power in the optical fiber with small core diameter can be avoided, thus ensuring the operation of the device.