ADSL broadband based on telephone lines has been gradually replaced by "optical fiber into the home". The data center wiring system is also increasingly using optical fiber network. "Optical copper retreat" has become the trend of data center construction. According to the survey report, the number of optical fiber ports has exceeded the number of copper cable ports in data cen...

Femtosecond lasers have made breakthroughs in their structural inability to deal with bulk silicon. The use of extreme NA values allows laser pulses to achieve sufficient ionization to destroy chemical bonds in silicon, leading to permanent structural changes in silicon materials.

The office close on Februray 1st, open at February 11th. wish everyone a happy New Year.

At present, for methane detection machines, there are mainly on-line gas detectors using non-dispersive infrared mode, and Catalytic Combustion Methane detectors.

Direct modulation of semiconductor lasers is to modulate the laser by superimposing the pre-modulated (AM, FM, PCM) signal current on the bias current of the laser. Because it is to change the intensity of light, it is also called intensity modulation. For digital transmission, although the speed is very high, only two working states of optical signal or non-optical signal are ...

Erbium-doped fiber amplifier (EDFA) uses Erbium ion as medium to realize energy conversion. The working wavelength window of energy amplification is 1550 nm and the width is 50 am, which coincides with the low loss window of optical fiber. The energy injection window is 980 nm and 1480 nm.

TDLAS is the abbreviation of Tunable Diode Laser Absorption Spectroscopy.

TDLAS technology is essentially a spectral absorption technology. The concentration of gas can be obtained by analyzing the selective absorption of laser by gas. It differs from traditional infrared absorption technology in that the spectral width of semiconductor lasers is much smaller than that of gas absorption lines.