Study On 850nm Polymer Optical Waveguide Chip Test

As an important branch of integrated optical devices, polymer waveguide has advantages of low cost, small size, easy preparation, low absorption loss, and it has been attracting more and more attentions. In the field of optical sensors, polymer waveguide based biosensor has the potential capacity of improving sensitivity, decreasing the cost and reducing the size of detection system.Compared to the polymer waveguide working at infrared wavelengths, the polymer waveguide, which works at 850nm wavelength, has advantages in low absorption of water, small size at single mode, and has great potential in optical bio-sensing. This thesis studies on the test of 850nm polymer optical waveguide chip, and the content is as follows:At first, the research background is introduced. Then the ridge waveguide structure and the coupling between the waveguide and fiber are analyzed. Next, the coupling efficiency between the waveguide and Hi780 single mode fiber and lens fiber is simulated by the Rsoft software. The coupling efficiency between the waveguide and Hi780 single mode fiber is 37.5%, while the coupling efficiency between the waveguide and lens fiber is 80%.The scheme with the 850nm SLED broadband light source and the optical spectrum analyzer is chosen for characterizing the waveguide ring resonator. The coupling measurement system for the waveguide chip is built up. Finally, the fabricated polymer waveguide chips are cleaved and the property is measured. The light through straight waveguide is realized and the resonant effect in the waveguide ring resonator is observed. This thesis provides a good foundation for 850 nm polymer waveguide chip testing and sensing.