A simple fiber-optic microprobe for high resolution light measurements: application in marine sediment
A simple fiber-optic microprobe for high resolution light measurements: application in marine sediment
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用于高分辨率光测量的简单光纤微探针：在海洋沉积物中的应用
DOI：
10.4319/lo.1986.31.6.1376
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发表时间：
1986
影响因子：
4.5
通讯作者：
D. D. Marais
中科院分区：
文献类型：
--
作者：
Bo Barker Jergensen;D. D. Marais
本发明描述了一种成本低廉且易于制造和使用的光纤嫌微物。它由一根80微米的光纤组成，光纤的末端逐渐变细，形成一个直径为20-30微米的圆形传感尖端。检测器是一个混合光电二极管/放大器。该探针的灵敏度为0.01微埃·米~（-2）·秒~（-1），光谱范围为300- 1100纳米。光谱光梯度测量细粒度的旧金山弗朗西斯科湾沉积物，有一个不受干扰的硅藻涂层的表面上。泥浆的透光层只有0.4毫米深。测量的原位光谱显示，由于叶绿素a、类胡萝卜素、藻蓝蛋白和细菌叶绿素a的吸收，在430-520、620-630、670和825-850 nm处具有最大消光。在紫色和红色或= 700 nm处发现可见光范围内的最大光穿透。
A fiber-optic microphobe is described which is inexpensive and simple to build and use. It consists of an 80-micrometers optical fiber which at the end is tapered down to a rounded sensing tip of 20-30-micrometers diameter. The detector is a hybrid photodiode/amplifier. The probe has a sensitivity of 0.01 microEinst m-2 s-1 and a spectral range of 300-1,100 nm. Spectral light gradients were measured in fine-grained San Francisco Bay sediment that had an undisturbed diatom coating on the surface. The photic zone of the mud was only 0.4 mm deep. Measured in situ spectra showed extinction maxima at 430-520, 620-630, 670, and 825-850 nm due to absorption by chlorophyll a, carotenoids, phycocyanin, and bacterio-chlorophyll a. Maximum light penetration in the visible range was found in both the violet and the red or = 700 nm.