NakuLaser Blog

 Desktop fiber optic adjustable attenuator is specially used for attenuation control of optical power in optical fiber optical paths. It has built-in power monitoring, large attenuation range, high adjustment accuracy, and stable power. It can be selected as normally open or normally closed type, and provides desktop or modular packaging.  This is a 1550nm Variable Optical Attenuator. Its attenuation range is 0~30dB, which is adjustable. The adjustment step of the attenuation value is 0.1dB. Single-mode optical fiber is used here. It supports both button adjustment and software control. Connect to PC software via RS232 communication interface. The control software interface. The test report of this optical attenuator. Instructions for use: Turn on the power switch at the back. Use the buttons to adjust the attenuation value. The left and right buttons are used to select the digit to be adjusted. The up and down buttons adjust the corresponding value.

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...

1550nm 1590nm  DFB Butterfly Laser Diodes  14-Pin PM Fiber The fiber  and fiber interface can be customized.  The Pin has N-type and S-type  to choose from. 

14-pin DFB Laser Diodes 1550nm Butterfly Laser The SWLD series laser diodes cover customer selection of large wavelengths from 1260nm to 1650nm which are fabricated in a hermetically sealed 14-pin butterfly package.The laser diodes  contains thermoelectric cooler (TEC), thermistor, monitor photodiode,optical isolator to secure high quality laser performance. We also have full customer selection of output powers, package types and output fibers of SM fibers, PM fibers and other special fibers. Our laser products are Telcordia GR-468 qualified, and in compliance with RoHS directives. [Features] 1. High output power(10~100mW) 2. High-performance, multiquantum well (MQW) distributed-feedback (DFB) laser 3. Industry-standard, 14-pin butterfly package 4. Built-in TEC and optical isolator 5. ITU wavelengths available from 1260 nm —1650 nm 6. Customer selection of wavelengths [Applications] 1. LAN, WAN and metro networks 2. C/DWDM systems 3. Fiberoptic sensors 4. Laser sources 5...