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实现了基于单偏振半导体光放大器高速扫频光源的光相干层析系统。系统中的扫频光源使用偏振相关的半导体光放大器,采用傅里叶域锁模结构。偏振相关的半导体光放大器有着增益谱宽大、输出功率高的优点,使得光源仅使用一个放大器即可获得足够的增益谱宽与输出功率。扫频光源输出功率达到32mW左右,有效扫描频率为45kHz,输出光谱的中心波长为1 326nm,光谱宽度为115nm。利用系统进行光相干层析成像时,横向分辨率为9μm,纵向分辨率为12.9μm左右,灵敏度为105dB。利用该系统实现了多种生物和非生物样品的光学相干层析成像。
The optical coherence tomography system based on high-speed swept frequency light source of single polarization semiconductor optical amplifier is realized. The frequency-swept source in the system uses a polarization-dependent semiconductor optical amplifier with a Fourier domain mode-locked structure. The polarization-dependent semiconductor optical amplifier has the advantages of wide gain spectrum and high output power, so that the light source can obtain sufficient gain spectrum width and output power with only one amplifier. Sweep frequency light source output power of about 32mW, effective scanning frequency of 45kHz, the output spectrum of the center wavelength of 1 326nm, the spectral width of 115nm. When using the system for optical coherence tomography, the lateral resolution is 9μm, the vertical resolution is about 12.9μm, and the sensitivity is 105dB. Using this system, optical coherence tomography of a wide range of biological and non-biological samples is achieved.