1.switch the wavelength is flexible. 2.Universal interface 3. Stabilized Output. 4.High Reliability. 5.Convenient field work Handheld Laser source series is microprocessor-controlled intelligent Handheld Laser source. It can be used to test the usual single-mode optical fiber connector loss,a single-mode fiber-optic network, LAN, FDDI, ATM , FTTH fiber optic systems, It also can test the ...