Aligning and attaching a lens to an optical fiber using light pressure force

Area of Science:

• Optics and Photonics
• Fiber Optics Technology
• Nanofabrication

Background:

• Accurate lens-to-fiber alignment is critical for efficient optical communication and sensing.
• Traditional alignment methods can be complex, time-consuming, and require specialized equipment.
• The precise manipulation of micro-optical components is a persistent challenge in photonics.

Purpose of the Study:

• To present two novel, cost-effective techniques for submicrometer lens centering on optical fiber cores.
• To demonstrate the use of optical radiation force for precise alignment of optical elements.
• To explore the versatility of this method for controlling light propagation from optical fibers.

Main Methods:

• Utilizing the radiation pressure exerted by light transmitted through an optical fiber.
• Employing simple and inexpensive setups for lens manipulation and alignment.
• Characterizing the alignment accuracy using submicrometer precision measurements.

Main Results:

• Achieved submicrometer accuracy in centering lenses onto optical fiber cores.
• Demonstrated the ability to focus, collimate, or defocus light emerging from the fiber by selecting appropriate lenses.
• Validated the technique's applicability to various lens types and light sources, including semiconductor lasers.

Conclusions:

• The demonstrated methods offer a simple, inexpensive, and highly accurate approach for lens-to-fiber alignment.
• Optical radiation force provides a viable mechanism for precise micro-optical component positioning.
• This technique has broad potential for applications in fiber optics, optical sensing, and laser systems.