Micro diffractive optical elements (µ-DOEs) have impacted integrated optoelectronic device fabrication by providing a means for the production of compact integrated devices by replacing bulky refractive optics. Thus, a new scheme of device design can be realized. A few examples of applications that can utilize µ-DOEs are:
- Micro imaging systems
- Optical communications
- Optical MEMS
- Micro sensors
Femtosecond laser direct writing provides an opportunity to produce 3D volumetric structures in transparent media through nonlinear absorption process enabled by in-depth focusing into the medium. Use of femtosecond laser direct writing can bring a few attractive features over conventional fabrication methods such as e-beam and holographic fabrication techniques.
- Fabrication of 3D volumetric micro-structures
- Single step process
- Customized design for prototyping
- Post processing available