Superluminescent Light Emitting Diodes for OCT, Current Sensors and FOG.

Shenzhen Box laser provides 830nm, 850nm, 1290nm, 1310nm, 1450nm, 1470nm, 1545nm, 1550nm, 1580nm, 1600nm and 1610nm sled butterfly package laser diode and driver circuit or sled module, sled broadband light source (superluminescent diode), 14 pin butterfly package and 14pin DIL package. Low, medium and high output power, wide spectrum range, fully meet the needs of different users. Low spectral fluctuation, low coherent noise, direct modulation up to 622MHz optional. Single mode pigtail or polarization maintaining pigtail is optional for output, 8 pin is optional, integrated PD is optional, and optical connector can be customized. The superluminescent light source is different from other traditional sleds based on ASE mode, which can output broadband bandwidth at high current. Low coherence reduces Rayleigh reflection noise. The high power single-mode fiber output has a wide spectrum at the same time, which cancels the receiving noise and improves the spatial resolution (for OCT) and detection sensitivity (for sensor). It is widely used in fiber optical current sensing, fiber optical current sensors, optical & Medical OCT, optical fiber gyroscopes, optical fiber communications system and so on.

Compared with the general broadband light source, SLED light source module has the characteristics of high output power and wide spectrum coverage. The product has desktop (for laboratory application) and modular (for engineering application). The core light source device adopts a special high output power sled with 3dB bandwidth of more than 40nm.

SLED broadband light source is an ultra wideband light source designed for special applications such as optical fiber sensing, fiber optic gyroscope, laboratory, University and Research Institute. Compared with the general light source, it has the characteristics of high output power and wide spectrum coverage. Through the unique circuit integration, it can place multiple sleds in a device to achieve the output spectrum flattening. The unique ATC and APC circuits ensure the stability of output power and spectrum by controlling the output of sled. By adjusting APC, the output power can be adjusted in a certain range.

This kind of light source has higher output power on the basis of the traditional broadband light source, and covers more spectral range than the ordinary broadband light source. The light source is divided into desktop light source module for engineering use. During the general core period, special light sources with a bandwidth of more than 3dB and a bandwidth of more than 40nm are used, and the output power is very high. Under the special circuit integration, we can use multiple ultra wideband light sources in one device, so as to ensure the effect of flat spectrum.

The radiation of this kind of ultra wideband light source is higher than that of semiconductor lasers, but lower than that of semiconductor light-emitting diodes. Because of its better characteristics, more series of products are gradually derived. However, ultra wideband light sources are also divided into two types according to the polarization of light sources, high polarization and low polarization.

830nm, 850nm SLED diode for Optical coherence tomography(OCT):

Optical coherence tomography (OCT) technology uses the basic principle of weak coherent light interferometer to detect the back reflection or several scattering signals of incident weak coherent light from different depth layers of biological tissue. By scanning, two-dimensional or three-dimensional structure images of biological tissue can be obtained.

Compared with other imaging technologies, such as ultrasonic imaging, nuclear magnetic resonance imaging (MRI), X-ray computed tomography (CT), etc., OCT technology has higher resolution (several microns). At the same time, compared with confocal microscopy, multiphoton microscopy and other ultra-high resolution technologies, OCT technology has greater tomography ability. It can be said that OCT technology fills the gap between the two kinds of imaging technology.

Structure and principle of optical coherence tomography

Broad ASE spectrum sources (SLD) and broad gain Semiconductor Optical Amplifiers are used as a key components for OCT light engines.