NakuLaser Blog

It's a red  fiber coupled laser , wavelength is 685nm. There are 3 working mode,  CW and TTL/Analog modulation . When use modulation work mode, the laser need be inputed 0-5V signal at ‘Mode Input’ BNC interface. Let's check it.

Lasers  are widely used in home appliances, medicine, industry, telecommunications and other fields. A few years ago, scientists introduced the concept of nanolasers. Their design is similar to traditional semiconductor lasers based on heterostructures that have been used for decades. The difference is that the cavity of nano lasers is very small, proportional to the wavelength of the light they emit. Since they mainly produce visible light and infrared light, their size is about one millionth of a meter. Nano lasers  have unique properties that are distinct from macro lasers. However, it is almost impossible to determine under what current the output radiation of a nanolaser is coherent; in addition, for practical applications, it is important to distinguish between two states of a nanolaser: a real laser effect with coherent output at high currents and a LED-like state with non-coherent output at low current. Researchers at the Moscow Institute of Physics and Technology ha

Since the advent of the first 10,000-watt laser cutting machine in 2017, the application of ten-thousand-watt lasers has become an industry hot spot. In 2018, as nearly 20 domestic laser equipment manufacturers successively launched 10,000-watt laser cutting machines, more laser companies also stepped up their plans to follow up with the introduction of domestic-made 10,000-watt lasers. There is a strong "arms race" posture. In 2019, 20,000 watts, 30,000 watts, and even higher power devices have been unveiled at major exhibitions at home and abroad, and the pursuit of higher power devices seems to be a trend. It is undeniable that the increase in power has brought some process innovations, while providing more choices for the metal cutting market, and also improving production efficiency. On the other hand, excessive emphasis on high power laser has also created some undesirable phenomena. Some companies blindly follow the trend and one-sided pursuit of high power, but

Abstract: The author briefly describes the main characteristics of laser processing, and also comprehensively introduces the specific application of laser drilling, laser cutting, laser welding and surface pre-heat treatment, the formation of lasers, and the rapid application of laser rapid prototypes in material processing. Based on these, the author has a reasonable outlook on the future development of laser technology in China. As one of the most practical, innovative and great inventions of the twentieth century, the invention and emergence of laser technology have produced huge changes in people's lives and work. It was nominated alongside electronic computers (Internet technology), aerospace technology, semiconductor technology , and thermonuclear technology for major scientific and technological achievements of this century. Human beings obtained the first laser for the first time in May 1960. It has now been nearly sixty years, and laser technology has penetrated into

After decades of development, laser technology has long moved from the laboratory to people's daily lives. Whether it is clothing, food, housing, or industrial processing, and then to medical cosmetology, laser light is everywhere, affecting all aspects of people's lives. From the development status of a country's laser industry , the overall industrial manufacturing level can be seen to a certain extent. In 2019, the growth rate of the laser industry has further slowed down. Although some companies have maintained high growth, more companies are facing declines in performance or even losses. Next, based on the performance of this year (revenue scale and market share), select 10 companies that have the most influence on the laser industry and see how they are doing in 2019. 1. TRUMPF Group Founded in 1923, the TRUMPF Group is one of the global market and technology leaders in the field of industrial production machine tools and lasers. After more than 90 years of dev

High-power lasers usually generate large amounts of heat, which can easily damage the laser tube for a long time. It is not recommended to use high-power lasers for a long time. Sometimes, the user needs to make the high-power laser work continuously for a long time. Is there any way? Figure 1. Without heat sink, can not work continuously for a long time We have summarized some experiences in actual work to share with you. 1. Select Laser Ask the merchant if the laser is with TEC when buying. TEC (Thermoelectric Cooler) is a semiconductor refrigeration chip, which is widely used in temperature control in various equipment. Figure 2. Heat sink and fan Laser working at high temperatures will cause damage to the laser tube, so it is also necessary to bring an overheating protection module. When the temperature rises to the limit of the laser tube, the laser must automatically stop working. 2. Do a good job of heat dissipation As long as the heat dissipation is done, t

The electromagnetic field distribution on the fiber end face is a zero-order Bessel function, and the Gaussian distribution is generally approximated as: Where r0 is the mode field radius of a  single-mode fiber ; r is the radial distance from any point on the fiber end face to the center. When the light wave transmitted through the long-distance vacuum reaches the receiving aperture, it can be regarded as a plane light wave. The electromagnetic field distribution at the focal point of the receiving lens is: Where f is the focal length of the coupling lens; λ is the wavelength; 2a is the aperture stop of the coupling lens; k is the wave number. The most important condition for efficient coupling of single-mode fiber is to meet the injection conditions (or mode field matching)-the laser coupled into the single-mode fiber has the same electromagnetic field distribution (amplitude and phase) as the single-mode fiber, and can obtain the highest Coupling efficiency. A feasi

According to US media reports, Boeing, the world's largest aerospace company, recently announced that its Compact Laser Weapon System (CLWS) has recently completed a series of key demonstrations with the US Air Force and the Army. The latest news shows that CLWS weapons with a power of 5 kilowatts have successfully completed several demonstrations of combat capabilities, verifying that they are ready for actual deployment. The test operator used a gamepad-like controller to lock and track small drone targets, and failed by firing a laser. Using the CLWS system fixed in a standard container, the system operator successfully destroyed about 30 targets on the first operation. Kurt Sorenson, Boeing CLWS project manager, said: "We have received a lot of feedback about the ease of use, maturity of the CLWS system, and its seamless integration into the command and control (C2) network. Over the past year, Boeing has been Five test sites demonstrated CLWS capabilities to military

Because of the good beam quality and heat dissipation of single emitter diode laser, it is more resuitable to be used in the source of electro-optic countermeasure. Aim at the responer curve of charge-coupled device (CCD) spectrum, 808nm single emitter is used as unitsource and 24 single emitters are divided into four groups. In order to increase the output power intensity, space sombination and polarization combination are used in the experiment. Combined beam is focused in an optical fiber through the focused lens group designed by ourself. All the single emittwes are connected inseries. When the drive current is 8.5A, 162W output power is obtained from a 300um fiber core with a numerical aperture of 0.22 at 808nm and coupling efficiency of 84%. Charge-coupled device (CCD), as a solid-state imaging device, is widely used in various optoelectronic devices, and plays an important role in reconnaissance, monitoring, and identification. The damage of CCD will cause the function of

 Japanese researchers have developed a device that can produce the world's shortest-wavelength laser, and a Nobel laureate predicts that this breakthrough will lead to dramatic changes in global manufacturing. Lasers  are used in precision equipment and instruments, including medical and manufacturing tools. According to a team of scientists from Nagoya University and Asahi Kasei, the shorter the laser wavelength, the more accurate the cut. Researchers say they made a laser generator out of semiconductors. The device can generate a laser with a wavelength of 271.8nm (one nanometer is one billionth of a meter). The shortest wavelength before semiconductor equipment reported in 2008 was 336nm. The laser device is expected to be combined with a miniature endoscope and can be used for a variety of purposes. "Miniature devices will revolutionize manufacturing around the world," Hiroshi Amano, a professor of engineering at Nagoya University and a 2014 Nobel Prize winne

1540nm narrow linewidth laser diode butterfly DFB semiconductor laser chip, wavelength 1530~1565nm C-band, single-mode fiber output, the use of professional design of the drive circuit and TEC control to ensure laser safety and stability.

It's a blue-violet LED light source at 405nm. this led light coupled a fiber with SMA905 interface. With adjustable power button, small size, is a very popular experimental light source.Let's check it now.

The drive current source circuit model is shown in Figure 2. In the figure, H1 (s) and H2 (s) are the transfer functions of the control circuit, and H3 (s) is the transfer function of the DC / DC conversion circuit. The DC / DC conversion circuit consists of a voltage-controlled PWM-type high-efficiency switching power supply. The output voltage is the output voltage of the drive current source of the LD module and the relationship between the control voltage Vc is approximately: V0 = 5Vc + 6, (1) where 0 ≤ Vc ≤ 2. Laser diodes are non-linear devices. Their volt-ampere characteristics are similar to those of diodes. If they are equivalent to linear resistors (RD = VD / ID) near the operating point, VD and ID are the operating voltage and current of the LD module , Then the transfer function of the linearized model of the current source circuit shown in Figure 2 can be expressed as: I (s) = H0 (s) Vs (s) / [RD + Rf + RfH0 (s)], (2) where H0 (s ) = H1 (s) H2 (s) H3 (s). If the