An all-fiber beam shaping using multimode fiber
- Resource Type
- Authors
- Faramarz Farahi; Mona Mayeh
- Source
- SPIE Proceedings.
- Subject
- Beam diameter
Optics
Materials science
Multi-mode optical fiber
Fiber optic sensor
business.industry
Physics::Accelerator Physics
M squared
Laser beam quality
Fiber
business
Beam (structure)
Gaussian beam
- Language
- ISSN
- 0277-786X
A new beam shaping technique has been developed by inverse etching the end face of a multimode fiber to form a concave cone tip. Concave tip fiber can convert a Gaussian beam profile to a flat top beam with a uniform intensity distribution. A flat top beam with intensity variation of approximately 5% and flat top diameter to spot diameter ratio of 67% has been achieved. With this technique one can also change the beam shape from a Gaussian to a donut by moving the observation plane. A flat top multimode fiber beam delivery has been tested for stimulation of prostate nerves.