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    • 3. 发明申请
    • WAVELENGTH SWEEPABLE LASER SOURCE
    • WO2014023777A2
    • 2014-02-13
    • PCT/EP2013/066572
    • 2013-08-07
    • DANMARKS TEKNISKE UNIVERSITET
    • YVIND, KrestenANSBÆK, ThorCHUNG, Il-SugHANSEN, Ole
    • H01S5/183
    • H01S5/1096B82Y20/00H01S5/0222H01S5/18311H01S5/18313H01S5/18366H01S5/18383H01S5/18386H01S5/18397H01S5/3013H01S5/3406H01S5/34313H01S2301/17
    • Wavelength sweepable laser source is disclosed, wherein the laser source is a semiconductor laser source adapted for generating laser light at a lasing wavelength. The laser source comprises a substrate, a first reflector, and a second reflector. The first and second reflector together defines an optical cavity, and are arranged to support light oscillation in the optical cavity along an optical path in a direction normal to the substrate. The optical cavity comprises a void in the optical path. The second reflector is resiliently suspended by a suspension in a distance from the first reflector and having a rest position, the second reflector and suspension together defining a microelectromechanical MEMS oscillator. The MEMS oscillator has a resonance frequency and is adapted for oscillating the second reflector on either side of the rest position. The laser source further comprises electrical connections adapted for applying an electric field to the MEMS oscillator. Furthermore, a laser source system and a method of use of the laser source are disclosed
    • 公开了波长可扫描的激光源,其中激光源是适于产生激光波长的激光的半导体激光源。 激光源包括衬底,第一反射器和第二反射器。 第一反射器和第二反射器一起限定光学腔,并且布置成沿垂直于基板的方向的光路支持光学腔中的光振荡。 光腔包括光路中的空隙。 第二反射器通过与第一反射器相距一定距离的悬架弹性地悬挂并且具有静止位置,第二反射器和悬架一起限定微机电MEMS振荡器。 MEMS振荡器具有共振频率并且适于在静止位置的任一侧上振荡第二反射器。 该激光源还包括适用于向MEMS振荡器施加电场的电连接。 此外,公开了一种激光源系统和该激光源的使用方法
    • 8. 发明申请
    • REFLECTIVITY-MODULATED GRATING MIRROR
    • 反光调制镜
    • WO2012155911A1
    • 2012-11-22
    • PCT/DK2012/050157
    • 2012-05-09
    • DANMARKS TEKNISKE UNIVERSITETCHUNG, Il-Sug
    • CHUNG, Il-Sug
    • H01S5/183H01S5/10
    • H01S5/18302H01S5/0655H01S5/105H01S5/18311H01S5/18316H01S5/18325H01S5/18327H01S5/18341H01S5/18366H01S5/18386H01S5/3095
    • The invention relates to vertical cavity lasers (VCL) incorporating a reflectivity-modulated grating mirror (1) for modulating the laser output. A cavity is formed by a bottom mirror (4), an active region (3), and an outcoupling top grating mirror (1) formed by a periodic refractive index grating region in a layer structure comprising a p- and a n-doped semiconductor layer with an electrooptic material layer (12) arranged there between. The grating region comprises a grating structure formed by periodic perforations to change the refractive index periodically in directions normal to the oscillation axis. A modulated voltage (91) is applied in reverse bias between the n- and p-doped layers to modulate the refractive index of the electrooptic material layer (12) and thereby the reflectivity spectrum of the grating mirror (1). The reflectivity of the grating mirror (1) can be modulated between a reflectivity with little or no out coupling and a reflectivity with normal out coupling, wherein lasing in the VCL is supported at both the first and the second reflectivity. As the out coupling mirror modulates the output, the lasing does not need to be modulated, and the invention provides the advantage of lower power consumption at high modulation speeds.
    • 本发明涉及结合有用于调制激光输出的反射率调制光栅镜(1)的垂直腔激光器(VCL)。 空腔由底部反射镜(4),有源区域(3)和外耦合顶部光栅镜(1)形成,该反射镜顶部光栅反射镜(1)由层状结构中的周期性折射率光栅区形成,该层结构包括p型和n型掺杂半导体 层之间布置有电光材料层(12)。 光栅区域包括通过周期性穿孔形成的光栅结构,以便以垂直于振荡轴线的方向周期性地改变折射率。 在n和p掺杂层之间以反向偏压施加调制电压(91),以调制电光材料层(12)的折射率,从而调制光栅镜(1)的反射光谱。 光栅反射镜(1)的反射率可以在具有很少或不具有耦合的反射率和具有正向耦合的反射率之间进行调制,其中VCL中的激光在第一和第二反射率都被支持。 由于外耦合镜调制输出,因此不需要对激光进行调制,本发明提供了在高调制速度下较低功耗的优点。