HOLLOW-CORE PHOTONIC CRYSTAL FIBER BASED BROADBAND RADIATION GENERATOR

    公开(公告)号:US20240427216A1

    公开(公告)日:2024-12-26

    申请号:US18699041

    申请日:2022-09-30

    Abstract: A broadband radiation source device configured for generating broadband output radiation upon receiving substantially linearly polarized input radiation, the source device including: a hollow-core photonic crystal fiber; at least a first polarization element operable to impose a substantially circular or elliptical polarization on the input radiation prior to being received by the hollow-core photonic crystal fiber; and a second polarization element operable in combination with the first polarization element to impose a substantially elliptical polarization on the input radiation, wherein the second polarization element and the first polarization element are oriented such that the elliptical polarization compensates at least partially for birefringence of the hollow-core photonic crystal fiber.

    RADIATION SOURCE AND A METHOD FOR USE IN METROLOGY APPLICATIONS

    公开(公告)号:US20210018676A1

    公开(公告)日:2021-01-21

    申请号:US16925586

    申请日:2020-07-10

    Abstract: A system and method for providing a radiation source. In one arrangement, the radiation source includes an optical fiber that is hollow, and has an axial direction, a gas that fills the hollow of the optical fiber, and a plurality of temperature setting devices disposed at respective positions along the axial direction of the optical fiber, wherein the temperature setting devices are configured to control the temperature of the gas to locally control the density of the gas.

    OPTICAL ELEMENT FOR GENERATION OF BROADBAND RADIATION

    公开(公告)号:US20240201561A1

    公开(公告)日:2024-06-20

    申请号:US18287160

    申请日:2022-04-12

    CPC classification number: G02F1/365 G02F1/3528

    Abstract: A monolithic optical element for generating broadband radiation upon receiving input radiation at an input end of the optical element is disclosed, the optical element including: a hollow core region for guiding the input radiation along a longitudinal axis of the optical element towards an output end of the optical element; a cladding region surrounding the core region along the longitudinal axis and including transversally arranged micro-structures configured to provide non-linear optical behavior to the optical element causing the generation of the broadband radiation; and a supporting region surrounding the cladding region along the longitudinal axis of at least part of the optical element, wherein the supporting region has a transversal dimension which is sufficiently large to render the at least part of the optical element substantially rigid.

    HOLLOW-CORE PHOTONIC CRYSTAL FIBER
    7.
    发明公开

    公开(公告)号:US20240053532A1

    公开(公告)日:2024-02-15

    申请号:US18271025

    申请日:2021-12-20

    CPC classification number: G02B6/02328 G02B6/02366 G02F1/3528 G02F1/365

    Abstract: A radiation source for generating broadband radiation, the source including an input assembly for providing input radiation and a hollow-core photonic crystal fiber configured to receive and confine the input radiation coupled into the fiber for generating broadband radiation through spectral broadening, wherein the input assembly includes a pump source configured to provide input radiation having an average power of at least 50 W, and wherein the hollow core photonic crystal fiber includes: a hollow core having a diameter of at least 35 μm; and a cladding region including a plurality of anti-resonant structures surrounding the hollow core, the anti-resonant structures including a wall portion having a wall thickness smaller than half the wavelength of the lower end of a wavelength range of the broadband radiation.

    RADIATION SOURCE
    8.
    发明申请

    公开(公告)号:US20220128910A1

    公开(公告)日:2022-04-28

    申请号:US17569674

    申请日:2022-01-06

    Abstract: A radiation source includes: a hollow core optical fiber, a working medium; and a pulsed pump radiation source. The hollow core optical fiber has a body and has a hollow core. The working medium is disposed within the hollow core. The pulsed pump radiation source is arranged to produce pulsed pump radiation that is received by, and propagates through, the hollow core from an input end to an output end. One or more parameters of the pulsed pump radiation, the optical fiber and the working medium are configured to allow soliton self-compression of the pulsed pump radiation so as to change a spectrum of the pulsed pump radiation so as to form output radiation. In some embodiments, a length of the optical fiber is such that the output end substantially coincides with a position at which a temporal extent of the pulsed pump radiation is minimal.

    Frequency Broadening Apparatus and Method
    9.
    发明申请

    公开(公告)号:US20200310251A1

    公开(公告)日:2020-10-01

    申请号:US16827843

    申请日:2020-03-24

    Abstract: An apparatus (100) for receiving input radiation (108) and broadening a frequency range of the input radiation so as to provide broadband output radiation (110). The apparatus comprises a fiber (102), wherein the fiber (102) may comprise a hollow core (104) for guiding radiation propagating through the fiber (102). The apparatus (100) further comprises an apparatus for providing a gas mixture (106) within the hollow core (104). The gas mixture (106) comprises a hydrogen component, and a working component, wherein the working component is for broadening a frequency range of a received input radiation (108) so as to provide the broadband output radiation (110). The apparatus may be included in a radiation source.

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