Light beam splitter, optical power monitoring device and laser chip
An optical beam splitter and optical coupler technology, which is applied to measurement devices, photometric methods, optical waveguides and light guides, etc., can solve problems such as high cost and occupy large space, and achieve low cost, reduced package size, and simple structure. compact effect
Inactive Publication Date: 2019-11-15
HUAWEI TECH CO LTD
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Problems solved by technology
This solution needs to occupy a large space, and the cost is high
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[0043] The technical solution in this application will be described below with reference to the accompanying drawings.
[0044] figure 1It is a schematic structural diagram of an optical beam splitter provided in an embodiment of the present application. The optical beam splitter includes a mode exciter 110 and a 1×1 multi-mode interference (MMI) optical coupler 120 . The output end face of the waveguide of the mode exciter is flush with the edge of the input end face of the first input waveguide segment of the 1×1 MMI optical coupler 120 . The mode exciter 110 is used to excite a part of the fundamental mode optical signal into a higher order mode optical signal, and the higher order mode optical signal and another part of the unexcited fundamental mode optical signal are transmitted to the 1×1MMI optical coupling through the output end face of the waveguide of the mode laser 110 The first input waveguide section 150 of the device 120, the other part of the unexcited fundam...
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The invention provides a light beam splitter, an optical power monitoring device and a laser chip. The light beam splitter comprises a mode exciter and a 1*1 MMI optical coupler, the output end surface of a waveguide of the mode exciter is leveled with the edge of the input end surface of a first input waveguide segment of the 1*1 MMI optical coupler to realize butt joint, the mode exciter excitespart of fundamental-mode optical signals into high-order-mode optical signals, the high-order-mode optical signals and the other part of fundamental-mode optical signals which are not excited are transmitted to the first input waveguide segment of the 1*1 MMI optical coupler via the output end surface of the waveguide of the mode exciter, the other part of fundamental-mode optical signals which are not excited are output of the first output wave guide segment of the 1*1 MMI optical coupler, and the high-order-mode optical signals are output of the second output wave guide segment of the 1*1 MMI optical coupler. The provided light beam splitter is simple and compact in structure, and can be integrated in a laser chip or other type of optical chips in the form of a single chip.
Description
technical field [0001] The present application relates to the field of semiconductors, in particular to an optical beam splitter, an optical power monitoring device and a laser chip. Background technique [0002] During the working process of an optical device or an optical chip, it is usually necessary to monitor the optical power in the optical path, so as to determine whether the system is normal. [0003] In traditional power monitoring, a polarization beam splitter, a monitor photodetector (MPD) and an MPD base are installed outside the optical chip to realize power monitoring. This solution needs to occupy a larger space and has a higher cost. Contents of the invention [0004] The present application provides an optical beam splitter, an optical power monitoring device and a laser chip, which can realize the integration of the optical beam splitter on the laser chip. [0005] In the first aspect, an optical beam splitter is provided, including: a mode exciter and ...
Claims
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Login to View More IPC IPC(8): G01J1/00G01J1/04G02B6/26
CPCG01J1/00G01J1/0414G02B6/26G01J1/04G02B6/14
Inventor 武林陈宏民
Owner HUAWEI TECH CO LTD