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Related Experiment Video

Updated: Jun 13, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

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Two-dimensionally arrayed optical-fiber splicing with a CO2 laser.

K Kinoshita¹, M Kobayashi

¹NTT Public Corporation, Japan.

|April 17, 2010

Summary

This study demonstrates CO(2) laser splicing for optical fibers in an 8x3 matrix. Average splice loss was 0.18 dB, proving repeated laser exposure doesn't increase loss below 5 x 10(2) W/cm(2).

Area of Science:

Optoelectronics
Materials Science
Laser Technology

Background:

Optical fiber bundles are crucial for high-bandwidth communication.
Matrix-form splicing presents challenges in alignment and fusion.
Carbon dioxide (CO(2)) lasers offer precise energy delivery for material processing.

Purpose of the Study:

To demonstrate the feasibility of splicing an 8x3 array of optical fibers using a CO(2) laser.
To evaluate the splice loss and reliability of this laser-based splicing technique.
To determine the impact of repeated laser exposure on splice integrity.

Main Methods:

End preparation of multimode graded-index optical fibers (60-microm core, 150-microm outer diameter).
Alignment of fibers into an 8x3 matrix with parallel axes and contacting endfaces.

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Fusion splicing using a CO(2) laser with a specialized focusing system, layer by layer.

Successive splicing of fiber pairs within each layer by passing them through the laser beam focal point.

Main Results:

Successful fusion splicing of an 8x3 optical fiber bundle was achieved.
The average splice loss across five trials (120 splices) was 0.18 dB.
Repeated CO(2) laser radiation did not increase splice loss when energy density remained below 5 x 10(2) W/cm(2).

Conclusions:

CO(2) laser splicing is an effective method for creating matrix-form optical fiber bundles.
The technique offers low average splice loss and high reliability.
This method is suitable for applications requiring precise and repeatable fiber optic connections.