Figure 1 | Scientific Reports

Figure 1

From: Transverse writing of three-dimensional tubular optical waveguides in glass with a slit-shaped femtosecond laser beam

Figure 1

Schematic illustration of the experimental setup.

POL: polarizer. CCD: charge coupled device. OBJ: objective lens. PC: personal computer. L1, L2, L3 and L4 are the lenses of different focal lengths which are described in the main text. Coordinates are indicated in the figure. Inset: An example of phase mask for writing the horizontal sides of the cladding.

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