KEYWORDS: Microlens, Point spread functions, Semiconductor lasers, Single mode fibers, Fiber couplers, Fiber coupled lasers, High power diode lasers, Fabrication, High power lasers, Fusion splicing
We propose a new scheme of the lensed fiber employing a pyramid-shaped fiber (PSF) for coupling the high-power diode lasers into the single-mode fibers (SMFs). First, the PSF was fabricated by grinding technique and then heating in a fusing splicer to form a quasi-ellipsoidal endface which described by the symmetric radius of curvatures in two axes. For an optimum microlens with high coupling efficiency, the dominate radius of curvature is typically smaller than the fiber mode field diameter. The advantage of the PSF structure was to be able to form the microlenses with small dominate rdius of curvatures and high asymmetric ratios of radius of curvatures, and therefore, this novel PSF can form microlenses with high aspect ratios to match the far field of the 980nm high power diode lasers which were used in the application of erbium-doped fiber amplifier (EDFA). A coupling efficiency of 83% has been demonstrated. A simplified and practical model was propsed to predict the radius of curvatures in the fabrication. The calculation of divergence angles and aspect ratios of lensed fiber far-field patterns were included in this study.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.