Operation of a tunable tandem-type low-coherence light source with high spectral brightness based on commercially available optical elements (superluminescent diode, semiconductor optical amplifier, and bulk dwiffraction grating) is studied experimentally. A unique combination of the output source characteristics, namely, a spectral power density of 36 mW nm⁻¹, a wavelength tuning range of 35 nm (834 – 869 nm), and a more than 20-dB excess of the central peak intensity over the superluminescent pedestal, is experimentally obtained. It is shown that the output radiation spectrum with a width of 1.4 nm has a smooth bell-shaped profile with side lobes lying below the superluminescent pedestal. It is proved that such a light source is of practical interest for various applications.

实验研究了基于商用光学元件（超发光二极管、半导体光放大器和体衍射光栅）的具有高光谱亮度的可调谐串联型低相干光源的操作。输出源特性的独特组合，即 36 mW nm ^-1的光谱功率密度、35 nm (834 – 869 nm) 的波长调谐范围以及超过 20 dB 的中心峰值强度超过超发光基座是通过实验获得的。结果表明，宽度为 1.4 nm 的输出辐射光谱具有平滑的钟形轮廓，旁瓣位于超发光基座下方。事实证明，这种光源对于各种应用具有实际意义。