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The Photonics Spotlight

Continuing Struggle for Larger Fiber Mode Areas

Dr. Rüdiger Paschotta

Ref.: encyclopedia articles on fibers, large mode area fibers, high power fiber lasers and amplifiers; spotlight articles of 2006-12-03, 2006-10-04, 2006-08-10

High power fiber lasers and amplifiers have of course been a very important topic at the conferences Photonics West in San Jose, January 20-25, and Advanced Solid-State Photonics (ASSP) in Vancouver, January 28-31. Quite a number of talks addressed the quest for larger mode areas, as this issue has been recognized as the central bottleneck which has to be overcome in order to continue the recent enormous performance enhancements. (See the previous spotlight articles on this topic as mentioned above.) Quite some creativity has been unleashed in the context of attempts to tackle this problem:

It remains to be seen how far we will get with all these approaches. So far, it is not clear whether we will obtain a practical approach for realizing more areas e.g. of 10'000 μm2 in fibers with reasonable handling properties. Fore sure, many people will continue to work hard in this direction, and obviously a breakthrough can be very rewarding.

This article is a posting of the Photonics Spotlight, authored by Dr. Rüdiger Paschotta. You may link to this page, because its location is permanent. See also the Encyclopedia of Laser Physics and Technology.

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