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    • 3. 发明申请
    • Optoelectronic device and method of making same
    • 光电子器件及其制造方法
    • US20110007764A1
    • 2011-01-13
    • US12803747
    • 2010-07-06
    • Nikolay Ledentsov
    • Nikolay Ledentsov
    • H01S5/34H01L33/06
    • H01S5/18341H01L33/0045H01L33/10H01L33/465H01S5/0654H01S5/1021H01S5/18302H01S5/1833H01S5/18369H01S5/2027
    • A device representing a reflector, for example, an evanescent reflector or a multilayer interference reflector with at least one reflectivity stopband is disclosed. A medium with means of generating optical gain is introduced into the layer or several layers of the reflector. The optical gain spectrum preferably overlaps with the spectral range of the reflectivity stopband. This device can be attached to air, semiconductor or dielectric material or multilayer structures and provide a tool for preferential amplification of the optical waves propagating at larger angles with respect to the interface with the evanescent or the multilayer interference reflector. Thus angle selective amplification or generation of light is possible. Several evanescent or interference reflectors can be used to serve the goal of preferable amplification the said optical waves.
    • 公开了一种表示反射器的装置,例如具有至少一个反射阻挡带的ev逝反射器或多层干涉反射器。 具有产生光学增益的方法的介质被引入反射器的层或几层中。 光学增益光谱优选与反射阻挡带的光谱范围重叠。 该装置可以连接到空气,半导体或电介质材料或多层结构,并提供用于优先放大相对于与渐逝或多层干涉反射器的界面以更大角度传播的光波的工具。 因此,角度选择性放大或光的产生是可能的。 可以使用几个消逝或干涉反射器来实现所述光波的优选放大的目标。
    • 4. 发明申请
    • HIGH SPEED NARROW SPECTRUM MINIARRAY OF VCSELS AND DATA TRANSMISSION DEVICE BASED THEREUPON
    • US20220368113A1
    • 2022-11-17
    • US17724041
    • 2022-04-19
    • Nikolay LedentsovVitaly Shchukin
    • Nikolay LedentsovVitaly Shchukin
    • H01S5/42H01S5/183H01S5/028
    • An on-chip miniarray of optically-coupled oxide-confined apertures of vertical cavity surface emitting lasers (VCSELs) is realized by etching holes from the chip surface down to at least one aperture layer. Oxidation of the aperture layer results in electrically-isolated apertures suitable for current injection. The lateral distance between the aperture centers and the shape of the aperture is chosen to result in effective interaction of the neighboring optical modes in the related aperture regions through optical field coupling effect causing the interaction-induced splitting of the wavelengths of the optical modes. At least one aperture has a different surface area due to different spacing of the etched holes. Different aperture sizes result in different wavelengths of the coupled modes. Splitting of the cavity modes in a frequency domain 3-100 GHz extends the modulation bandwidth of the device due to photon-photon interaction effects.
      Selective deposition of highly reflective coating and/or anti-reflecting coating over apertures of different VCSELs foiining a miniarray allows stabilizing lasing in a single coherent mode of the array. Most preferably, highly reflective coating covers the largest aperture and stabilizes the fundamental mode of the coherent array. Anti-reflecting coatings can be deposited on at least one other aperture to reduce the photon lifetime and increase the homogeneous broadening of the related resonant wavelength. Consequently broadening of the photon-photon interaction resonances between the cavity modes can be controlled. Such resonance broadening allows control over the shape of the current modulation curve of the miniarray of VCSELs with the frequency maximum defined by the splitting of the cavity modes and the broadening defined by the broadening of the photon resonances. An increase in −3dB modulation bandwidth of the VCSEL miniarray up to at least 70 GHz is possible.
      Such miniarray of VCSELs enables efficient coupling of the emitted light to a multimode optical fiber with the efficiency of at least 70%.