NakuLaser Blog

With the rapid development of science and technology, fiber lasers, as an efficient and stable light source, have been widely used in many fields such as communications, medical treatment, and material processing. Among them, the 1550nm nanosecond fiber laser plays an increasingly important role in scientific research and industrial applications due to its unique wavelength characteristics and excellent performance. First, let's take a look at the wavelength characteristics of the 1550nm nanosecond fiber laser. 1550nm is located in the infrared spectrum range and belongs to near-infrared light. Laser of this wavelength shows excellent transmission performance in optical communications, which can effectively reduce fiber loss and improve communication efficiency. At the same time, in the fields of medical treatment and material processing, the 1550nm laser has strong penetration and can achieve precise treatment of deep tissues and fine processing of high-hardness materials. Nanosec...

 The 1550nm band single-wavelength laser (low power) adopts high-stability semiconductor laser chip, polarization maintaining or single-mode fiber output , professionally designed drive and temperature control circuit control to ensure the safe and stable operation of the laser. This is a 1550nm narrow linewidth laser. The output power can be adjusted, and the adjustment accuracy is 0.1mW. This is a narrow linewidth laser with a spectral bandwidth of less than 1MHz. Narrow linewidth lasers at the kHz level can also be customized. Software control function can be customized,using RS232 communication serial port. Default only supports button control. The standard version is controlled by buttons to control the switch and adjust the power. PM1550 polarization maintaining fiber is installed, and SM single-mode fiber can also be customized. The test report for this 1550nm narrow linewidth fiber laser.

 This is a 1550nm 10mW SLD light source of module type. It is equipped with a single mode fiber. It can be customized power adjustable version. When the power adjustment is selected, the power adjustment is controlled through the RS232 serial communication. The standard version is a fixed power mode, the light source is controlled by the button. We tested it with an infrared photosensitive film, and we could see a light spot. Let's check it now. SLD broadband light source adopts super radiant semiconductor diode light-emitting chip , which outputs broadband spectrum with low coherence degree and high output optical power spectral density. The operating wavelength can be selected from O, S, C, L and other bands, suitable for optical OCT, optical fiber sensing applications. The test data report and spectrum of 1550nm light source.

 Our fiber lasers are also available in two package modes: benchtop and module type. The module type is controlled by software. The benchtop fiber laser is controlled by button. It can be customized software control, use RS232-USB data cable to connect computer software. These two package modes are also applicable to EDFA, YDFA, ASE/SLD broadband light source,... 1550±1nm 10W Nano-second Pulse Fiber Laser module type : Nanosecond pulse laser adopts unique circuit and optical optimization design, output laser pulse width, peak power and repetition frequency can be adjusted, working wavelength and power output are stable, single-mode fiber output, modular type is convenient for system integration, suitable for distributed Fiber optic sensing system. 976nm 9W Fiber Laser Benchtop  button control: High-power laser light source is based on high-performance semiconductor laser chip, 105/125μm fiber coupling output. The professionally designed constant current drive and tem...

 The filter-type polarization-maintaining coupler uses interference-type filters to not only split the light beam from the input PM fiber into two output PM fibers, but also combine the light of two PM fibers into one PM fiber. This device can be used to separate high-power linearly polarized light into multiple channels without changing the linear polarization. It can also be used as a power splitter to monitor the signal of the PM fiber system without changing the polarization state of the optical signal. power. This is a 1550nm 1x2 PM fiber coupler. 1x2, 2x2 polarization maintaining fiber coupler is optional. 1310nm working wavelength is optional. The FC/APC interface is used by default, other interfaces can be customized. The Test Data Sheet of 1550nm 1:2 PM Fiber Coupler .

1 Introduction As a light source  of fiber laser sensor, narrow linewidth fiber laser has the characteristics of interference to electromagnetic field, safety, small size and remote control. Currently, there are three schemes for obtaining single longitudinal mode narrow linewidth fiber lasers. 1) Non-coherent technology that eliminates spatial hole burning caused by standing wave effect by controlling the polarization state of the encountering light waves in the cavity; 2) adding unpumped doped fiber in the laser cavity to select the frequency and suppressing the saturated absorption of the mode-hopping Body; 3) short cavity fiber laser, including DFB fiber laser and short cavity DBR fiber laser. Comparing the three schemes, it is found that schemes 1 and 2 require the use of multiple polarization controllers, and most of them have annular cavity structures, which are difficult to control, low conversion efficiency, and extremely low output power; while scheme 3 has a simple stru...