Cellular Image Classification by Xiang Xu Xingkun Wu & Feng Lin

Author:Xiang Xu, Xingkun Wu & Feng Lin
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

By exciting LP21 mode in an optical fiber, a focused LP21 spot is obtained, as shown in Fig. 3.15, where Fig. 3.15a shows the experimentally measured averaged pre-focused intensity distribution of the four lobes in the LP21 beam. Figure 3.15b displays microscopic images of the focused beam spots both on focal plane and 90 m in front of the focal plane, with their beam waists being 6.2 m and 1.4 m, respectively. Two yellow lines indicate beam spot shrinkage through beam focusing.

Fig. 3.15 a Measured intensity distribution of LP21 beam from the fiber end (before being focused by axicon fiber lens); b Microscopic image of the focused beam intensity distribution 90 m in front of focal plane, and the beam profile at focal plane

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