Spectral bandwidth: Generally, fiber Bragg gratings are characterized using a 3dB bandwidth. The use of ASE broadband light sources can provide broadband spectra, covering a larger frequency range. This makes it possible to replace traditional monochromatic lasers in many tests, reducing the need for light source switching and tuning.

Spectral characteristic analysis: ASE broadband light source provides broadband spectrum light, which can be used to analyze the spectral characteristics of fiber Bragg gratings and obtain spectral characteristic information such as fiber Bragg gratings.

ASE broadband light source can test parameters:

Multi channel testing: WDM systems typically use multiple optical signals of different wavelengths for transmission. The wide wavelength range of ASE broadband light sources enables them to provide a continuous spectrum covering multiple channels, making it convenient for multi-channel testing and monitoring.

Insertion loss test: Insertion loss is the attenuation caused by the insertion of a wavelength division multiplexer (WDM) in an optical transmission system. ASE broadband light sources can provide high power density light sources, generate sufficient signal strength, and ensure that light does not weaken due to losses when passing through WDM devices, thereby affecting the accuracy of test results.

Isolation test: Isolation refers to the degree of isolation between various channel signals. Connect the ASE broadband light source to one port in the system, and then use testing equipment such as an optical power meter or spectrometer to measure the output power or spectrum of the other port. By comparing the output power or spectrum of optical signals of different wavelengths, the isolation of the beam splitter or multiplexer can be calculated. When measuring WDM systems, optical components such as filters or splitters are required to select specific wavelength components.

OSNR (Optical Signal to Noise Ratio) is used to measure the ratio between the intensity of optical signals and noise. In this link testing system, ASE broadband light sources can provide sufficient noise optical signals. This noise optical signal will be transmitted through optical fibers and mixed with signal light. The receiving end will use a spectral analyzer to measure the power spectral density parameters of the mixed signal and calculate the signal-to-noise ratio (SNR) of the optical signal, thereby obtaining the value of OSNR. It is one of the key indicators for evaluating the performance of optical communication systems.

The various light sources and passive optical devices developed and manufactured by Xuece Company have a wide range of applications and testing in the field of optics, covering multiple aspects such as optical communication, optical sensing, scientific research, and optical equipment testing.