Optical Coherence Tomography (OCT) is a low-loss, high-resolution, non-invasive medical and imaging technology developed in the early 1990s. Its principle is similar to ultrasound imaging, the difference is that it uses light instead of sound.

6mW 850nm SLD butterfly laser diode with FC/APC Hi780 single mode fiber

Application of Fiber Bragg Grating in Fiber Communication System As a new optical device, Fiber Bragg Grating is mainly used in fiber communication, fiber sensing and optical information processing.

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.