Figure 4.

The polymeric assembled optical stretcher. (a) SEM image of the Ni shim at the area where the fiber grooves meet the channel. Higher position of the fiber grooves with respect to the central channel will lead to the lower position of the fibers after insertion; (b) Bright filed microscope image of the chip at the same area with a photonic crystal fiber (left) and single mode fiber (right) inserted; (c) The finished chip ready for use. The three inlets are for hydrodynamic focusing purpose. Figure reproduced from Reference [30] under CC-BY 4.0 license.