Fluorescent fibers are composed of a fluorescent material and some rare elements incorporated into the core and cladding. The fluorescent substance can absorb light in a specific wavelength range, cause itself to be excited, and then emit fluorescence in various directions, wherein the fluorescence whose radiation direction satisfies the total reflection condition of the core-cladding interface will be transmitted along the axial direction of the optical fiber. Compared to conventional communication fibers, fluorescent fibers can receive light incident in any direction, rather than only receiving a certain range of light entering the fiber from the end face (the so-called numerical aperture problem). After the fluorescent material receives light of a certain wavelength (excited spectrum), the stimulated radiation emits light energy. The stimulated peak wavelength is different from the peak wavelength of the radiation. This phenomenon is called Stokes frequency shift. For fluorescent molecules, the Stokes shift is about 100 to 200 nm, but this value is affected by other dopants. After the excitation disappears, the persistence of fluorescent luminescence depends on the life of the excited state. This luminescence is usually attenuated exponentially, and the time constant of the decay is called the fluorescence lifetime or the fluorescence fading time. Polystyrene (PS) and PMMA doped with fluorescent substances are used as the core layer of the optical fiber, and fluororesin has the normal light transmission function as the cortical fluorescent fiber. The biggest feature is that it absorbs light from the side and emits light from the end face, emitting light color. There are red, yellow, green, violet, orange, etc. The diameter of the product is 0.5/0.75/1.0/1.5/2.0mm. At present, fluorescent fibers have been widely used in decoration, advertising and sensing (light detection such as step, gun sight, bow, arrow sight, light wavelength conversion, etc.). Nanjing Hecho Technology specializes in the production and supply of various optical fibers, such as Fiber Optic Cables, Fiber Optic Bundles, UV/VIS/IR Fiber Cables, Fiber Optic Illuminator, Optical Fiber Sensor and other products standardization and customized services.

A large number of fiber filaments are gathered into a bundle of fibers having a diameter of dB, and the basic characteristics of the bundle are the same as those of a single fiber core. The light transmission characteristics of the Fiber Optic Bundles are similar to those of a single fiber. Tilting the bundle of fibers relative to their axis affects the output light characteristics. An optical fiber with an outer ring of the beam end face converts the uneven input light into a uniform output light. Twisted fiber Parallel array of fibers Figure 1: Same input light, different output light This is possible because the direction of the twisted fiber is close to the direction of the coupling light at the input. After the light enters the fiber bundle entrance and is refracted, the light coupled to the fiber propagates in the same direction along the fiber axis. Because the light propagating in the twisted fiber at the input end has the maximum intensity at the 0° angle, that is, the fiber axis, and the output end fiber is parallel to the axis of the fiber bundle, the minimum light intensity appearing at the position of the fiber bundle axis (Fig. 1 ) will be compensated. The geometry of the fiber bundle input and output can be designed to meet the lighting needs. It can be square, rectangular, straight or with multiple branches of different shapes or sizes. In this way, the fiber optic component can pass light from one end to the other. Two Branched Light Guide Multi-branched Light Guide Line Light Guide Line Light Guide with Lens Ring Light Guide LED Light Source with Ringlights Loss in the Fiber bundles In principle, the loss mechanism of all of the above individual fibers is applicable to the fiber bundle. The fibers are tightly clamped and cured together with epoxy. This results in two additional losses, which are only related to the bundle: gap loss and cladding loss. The end of the fiber can be specially treated by heating, so that the fiber is hexagonal and arranged more closely. This reduces the gap loss and increases light transmission by 10%.

Laser processing mainly uses high-energy laser to cut, weld, punch, mark, form, surface treat, and modify doping. Commonly used light sources in the industry are CO2 gas laser (wavelength 10.6 um) and YAG solid laser (wavelength 1.064 um). Laser processing is widely used in the automotive, electronics, electrical appliances, aviation, metallurgy, machinery manufacturing, military and other industries, and plays an important role in economic development. During laser processing, laser beam irradiation interacts with the material on the workpiece to complete the machining process. Therefore, it is non-contact, non-abrasive, non-noisy (or little noise), and free from swarf. It basically does not cause pollution to the environment. Therefore, laser processing technology is a kind of green processing technology, which will inevitably be called an advanced processing technology in the 21st century. Optical transmission factors: The factors affecting the energy transfer of the fiber include the incident beam parameters, fiber end face and coupling coupling, fiber length, fiber core diameter, and radial refractive index profile of the fiber. The large-diameter fiber is often used for the transmission of multimode high power Nd:YAG laser beams, and the spatial intensity distribution of the beam at the output depends on the implantation conditions, the misalignment of the incident spot with the fiber, and the bending of the fiber. The lateral offset severely affects the distribution of meridional fibers and slanted rays within the fiber. The angular offset does not change the ratio of meridional rays to oblique rays, but changes the propagation directions of meridional rays and slanted rays in the fiber. Lateral excursion stimulates a large number of oblique rays, and the optical energy distribution of the laser output is more uniform, and the “homogenization” effect of the angle shift is weak. When the optical fiber is bent, when the total reflection condition of the light in the core cannot be satisfied, the light enters the cladding and forms an evanescent wave. The light guiding performance of the optical fiber is reduced, resulting in attenuation of light energy. In the case of laser technology and optical fiber manufacturing technology has achieved tremendous development, the use of optical fiber transmission laser beam in laser flexible processing is the best choice. The 1.06um Nd:YAG laser beam, and semiconductor lasers in the visible and near-infrared wavelengths are well suited for current commercial fiber optic transmission. The design of a reasonable fiber-optic energy transmission system must take into account the characteristics of the laser source, the laser injection conditions, the length of the fiber, the core diameter, and bending and other factors.

Holmium laser is a high-tech technology that emerged at the end of the 20th century and is one of the most advanced minimally invasive surgical techniques. It uses pulsed light to activate the pulsed laser generated by the rare element embedded in the yttrium-aluminum-garnet crystal. It uses holmium laser lithotripsy to cut, vaporize, and stop bleeding. It can smash any hard urinary tract. Stones, do not harm the body's soft tissue, a single operation stone crushing rate of more than 95%, the standard for the new age of gravel. The advantages of holmium laser lithotripsy: 1. The world's newest stone treatment method, a major breakthrough in the global minimally invasive stone. 2. It is effective for all kinds of stones (including calcium oxalate and phosphate, carbonate stones, cystine, uric acid stones, etc.). 3, No surgery, the surgical process 10 --- 20 minutes, simultaneous treatment of ureteral stenosis and polyps. 4, Accurate, safe, reliable, no bleeding. 5, Hospitalization time is short, recovery is quick, the cost is lower than traditional surgery. 6, A treatment is about to completely remove the stone, the success rate of a treatment of 98% - 100%, while the treatment rate of extracorporeal shock wave lithotripsy is only 20% - 60% (usually more than twice the treatment). 7, Soft fiber can be through the speculum straight to the stone, the crushed, so through the bladder urethroscope, ureteroscopy, nephroscopy and other into the urinary tract, all urinary tract stones can be treated to reduce trauma and patient suffering Small, restore. Under the guidance of B-ultrasound, through a ureteroscope with a skin-kidney channel diameter of only 3 mm, a holmium laser lithotripsy system was used to crush the stones and drain them along the channels. The small surgical incision (only 4 mm in diameter), compared with the traditional kidney incision and lithotripsy, greatly reduced the incidence of renal hemorrhage, rapid postoperative recovery, short hospital stay, and a high rate of stone exhaustion with good results. Minimally invasive percutaneous nephrolithotomy holmium laser lithotripsy is currently an advanced, effective, minimally invasive treatment for the treatment of kidney stones. It is praised by the majority of patients as a non-invasive lithotripsy and is a gold for modern kidney stones treatment. standard. Nanjing Hecho Technology Co., Ltd. manufactures and supplies Holmium Laser Fiber. The optical fiber material conforms to medical standards and can be sterilized and sterilized. The part that enters the human body meets the requirements of biocompatibility. Optical fiber monofilament diameter 275/365/550μm, transmission wavelength 400--2500nm, numerical aperture NA0.22, helium-neon laser fiber transmission power ≤800W/cm2 (550μm Quartz High Power Fiber, Nd:YAG CW laser), end structure SMA905 /SMA906/FC/ST and other custom structures are optional.

As a high-quality transmission medium, optical fiber is changing our lives. It promotes the development of the information age and enables people to swim and enjoy high-definition television programs on the Internet. In the medical field, the “figures” of optical fibers can be seen in both large-scale medical diagnostic imaging devices and implantable medical device products. Due to the increase in the use of fiber optics for minimally invasive surgery, the increased demand for advanced diagnostic techniques, and the rapid development of medical fiber technology, the Medical Laser Fiber market has grown at a significant rate. The number of medical optical fiber applications including X-ray imaging, ophthalmic lasers, phototherapy, laboratory and clinical diagnostics, dental headpieces, surgical and in vitro diagnostic instruments, surgical microscopes, and endoscopy has increased significantly. In addition, the miniaturization of medical devices has also increased the demand for medical fiber technology. 1. Laser Surgery Conventional laser surgery can be used in gynecology, anorectal, surgery, dermatology, dentistry, urology, etc., for treatment such as tissue cutting, vaporization, irradiation, and so on. For body surface lesions, the laser can be transmitted with a simple lens, while for the internal lesions, fiber output is required. The output of the fiber can be installed with a spherical and cylindrical laser diffuser, and can also be filled with scattering media, so that the light Spread evenly around. Among them, the low-hydroxyl silica laser fiber can be used to transmit a 2.14μm He-Ne laser, which is currently gaining more applications in the field of laser lithotripsy. In addition, Quartz Laser Fiber surgery can also be used for oral hard tissue therapy, minimally invasive pharyngeal surgery, condyloma acuminatum and other treatments. 2. Laser Therapy Directly irradiating the affected part with a weak laser (such as a Holmium Laser, a semiconductor laser, etc.) causes a series of biological effects, thereby achieving the purpose of accelerating healing or relieving pain and other auxiliary treatments. For the treatment of small areas of the body surface or part of the cavity (such as the nasal cavity, external auditory meatus, vagina, urethra), such as super pain red light treatment instrument. 3. Photodynamic therapy Photodynamic therapy mainly uses tumor tissues and normal tissues to have different affinity properties for photosensitizers. Tumor tissues absorb and retain more photosensitizers. Photochemical reactions occur under the participation of oxygen in biological tissues when irradiated with light of specific wavelengths. The generation of singlet oxygen and (or) free radicals, destruction of a variety of biological macromolecules in tissues and cells, eventually causing tumor cell death, for therapeutic purposes. An optical fiber can transmit laser light of a specific wavelength to a diseased tissue for long-distance irradiation, and the tip can be made into various shapes.

Color rendering refers to the objective effect produced by light emitted by a light source on an object and the degree of appearance of the true color of the object, which is an important indicator of the illumination light source. The light source with high color rendering performs better on the color, the color seen is close to the natural color, and the light source with low color rendering performs poorly on the color, and the color deviation seen is also large. If the light emitted by the light source contains a proportion of each color of light that is similar to natural light, the colors seen by the human eye are more realistic. The spectral distribution of the light source determines the color rendering of the light source. The color rendering of the light source affects the color of the object observed by the human eye. Quantitative evaluation of the color rendering property of the light source is an important indicator for evaluating the quality of the light source. General artificial lighting sources use the general color rendering index as an evaluation index of color rendering, and the color rendering index is also an important parameter to measure the color characteristics of the light source. According to different application fields, Nanjing Hecho Technology Co., Ltd. launched a new ultra-bright high color rendering index medical Endoscope Light Source Module; ultra-high brightness LED Cold Light Source, and Fiber Optic Illuminators and other products to meet the needs of different customers, welcome The majority of new and old customers to inquire.

Hecho is a professional manufacturer of Fiber Optic Sensors, the sensor can be perfect instead of the Keyence, Omron and other brands of the same type sensors. Today, fiber optic sensors have been widely used in industrial automation, power systems, petroleum industry, civil engineering and other fields. Fiber optic sensors play an important role in the power system, mainly used in the following areas: 1, Fiber sensors in the high-voltage cable temperature and strain measurement applications Ideally, the fiber should be positioned as close as possible to the cable core to more accurately measure the actual temperature of the cable. For the buried power cable, the surface-mount fiber can not accurately reflect the cable load changes, but the Fiber Optic Cable buried at the soil thermal resistance changes are more sensitive, and can reduce the installation cost of optical fiber. 2, Fiber sensors in the electric power sensor application The main characteristics of optical fiber electrical power sensor are: Because electric power sensing involves voltage and current, it usually needs to consider electro-optical and magneto-optic effect simultaneously, and use two kinds of sensing media or one kind of multi-functional medium as sensitive components. So that the structure of fiber optic power sensor head is relatively complex; optical fiber electrical power sensor optical sensor signal sometimes contains both voltage and current signals, so the signal detection and processing methods will also be more complex 3, Optical fiber sensors in the electric power system optical cable monitoring application By measuring the frequency shift and intensity of the Brillouin scattered light along the length of the fiber, the temperature and strain information of the fiber can be obtained, and the sensing distance is far, so it has far-reaching engineering research value. Hecho supply various shape fiber optic sensors, including Heat Resistant Sensor, wide area sensor, limit lighting sensor, Flat sensors, and so on. For more details, pls visit our website: www.gohecho.com