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  • 专利标题:   Saturable absorber device used in laser cavity for e.g. infrared detection comprises optical element, and absorber material with polarized ferroelectric material/graphene to form gate tunable graphene-ferroelectric hybrid saturable absorber.
  • 专利号:   WO2013184072-A1, EP2859628-A1, SG11201406194-A1, US2015155681-A1, US9184553-B2, BR112014029646-A2, SG11201406194-B, EP2859628-A4, EP2859628-B1
  • 发明人:   OEZYILMAZ B, NI G X, ZHENG Y, OZYILMAZ B, OEZYILMAZ B
  • 专利权人:   UNIV SINGAPORE NAT, UNIV SINGAPORE NAT, UNIV SINGAPORE NAT
  • 国际专利分类:   H01G009/20, H01L027/15, H01L033/00, H01L051/00, H01S003/127, H01S005/06, C23C016/04, C23C016/26, C23C016/44, H01S003/067, H01S003/094, H01S003/11, G02F001/35, C23C016/01
  • 专利详细信息:   WO2013184072-A1 12 Dec 2013 H01S-005/06 201401 Pages: 56 English
  • 申请详细信息:   WO2013184072-A1 WOSG000237 06 Jun 2013
  • 优先权号:   US656099P, US14405671

▎ 摘　　要

NOVELTY - A saturable absorber device (22) comprises optical element; and saturable absorber material supported by optical element and having polarized ferroelectric material and graphene substrate, where graphene substrate is layered with ferroelectric material to form gate tunable graphene-ferroelectric hybrid saturable absorber (30). USE - As graphene-ferroelectric hybrid saturable absorber device useful in ultra-fast laser systems and novel types of plasmonics for infrared detection, single-photon quantum devices and ultrasensitive detectors; also useful for pulse shaping; in fiber lasers for optical signal processing, mode locking, Q-switching, optical pulse shaping, and optical switching. ADVANTAGE - The graphene-ferroelectric hybrid structure has realization of ultrafast, low power consumption and multi-wavelength operation saturable absorbers. The graphene-ferroelectric hybrid saturable absorber device exhibits optical switching operation by transmittance change accompanying saturable absorption by the graphene-ferroelectric hybrid saturable absorber material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) fiber laser comprising ring or linear laser cavity; and saturated absorber device arranged within the laser cavity; (2) forming saturable absorber device involving providing optical element; and supporting a saturable absorber material comprising ferroelectric material and graphene substrate with the optical element; and (3) fabricating the saturable absorber material involving depositing a layer of graphene on substrate by template-directed chemical vapor deposition (CVD); depositing a layer of ferroelectric material on graphene; removing the substrate via wet chemical etching; and doping the material after etching treatment, by applying electric field to obtain graphene-ferroelectric hybrid saturable absorber material. DESCRIPTION OF DRAWING(S) - The figure shows perspective view of saturable absorber device. Fiber core (4) Ferrule (6) Endface (8) Optical fiber (10) Saturable absorber device (22) Graphene-ferroelectric hybrid saturable absorber (30) Fiber pigtail (100)