ULTRA-BROADBAND GRAPHENE-BASED SATURABLE ABSORBER MIRROR
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United States of America Patent
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Issued Date -
Jul 25, 2013
app pub date -
Oct 17, 2012
filing date -
Jan 20, 2012
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Abstract
An Ultra-broadband graphene-based saturable absorber mirror (graphene SAM) used as passive mode locker and Q-switch of lasers was invented. The graphene SAM comprises an optical substrate, an Aurum(Au) reflection film and graphene layer(s). Combining the ultra-broadband high reflectivity of Au film with ultra-broadband saturable absorption of graphene, the graphene SAM could be used as saturable absorber for passive mode locking and Q-switching over an ultra-wide spectral range from near-infrared to mid-infrared spectral region. Compared to semiconductor saturable absorber mirror (SESAM), the graphene SAM has the advantages of ultra-broadband operation, low linear loss, easy fabrication, low cost, and enabling mass production. This invented graphene SAM will have a wide prospect of application.
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