Reflector structure for adjustable laser and adjustable laser
A mirror and laser technology, applied in the field of lasers, can solve the problems of large power consumption of tuning components, achieve the effects of reducing overall power consumption, improving thermal resistance, and avoiding deterioration of flatness
Active Publication Date: 2018-11-23
HUAWEI TECH CO LTD
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Problems solved by technology
In summary, compared with current injection tuning, the advantage of thermal tuning is that a narrower laser linewidth can be obtained, but the disadvantage is that the power consumption of the tuning components is too large
Method used
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[0077] The technical solution in this application will be described below with reference to the accompanying drawings.
[0078] figure 2 is a schematic diagram of the cross-section of the reflector structure 1-1 using thermal tuning. like figure 2 As shown, the mirror structure includes from bottom to top: a substrate layer 01 , a buffer layer 02 , a lower cladding layer 03 , a waveguide layer 04 , an upper cladding layer 05 , a dielectric layer 06 and a heater layer 07 . The reflector structure also includes a reflector 08 (such as figure 2 As shown in the black and white part in the middle), the reflector 08 is located at the interface between the waveguide layer 04 and the upper cladding layer 05 .
[0079] Among them, the waveguide layer 04 is used to provide a low-loss propagation channel for light. The refractive index of the upper cladding layer 05 and the lower cladding layer 03 is lower than that of the waveguide layer 04, so light will form total reflection wh...
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The invention provides a reflector structure for an adjustable laser and the adjustable laser. The reflector structure adopts a superstructure grating as a reflector, and a suspended structure is formed around the area where the superstructure grating is located; thermal isolation is formed around the area where the superstructure grating is located through the suspended structure, so that thermalresistance is improved, and heat loss is reduced, and the heat is concentrated in the area where the superstructure grating is located, and therefore, the thermal tuning efficiency of the reflector structure can be improved, and the overall power consumption of the adjustable laser can be reduced. Meanwhile, lateral supporting structures are arranged on the two sides of the suspended structure, so that mechanical support is provided for the suspended structure. In addition, the corresponding regions, in the superstructure grating, of any two lateral supporting structures on the same side of the suspended structure fall at different positions in the space period of the superstructure grating, so that the flatness deterioration of the reflection spectrum of the superstructure grating can beavoided during thermal tuning, thereby avoiding deterioration of the performance of the adjustable laser.
Description
technical field [0001] This application relates to the field of lasers, and more particularly, to mirror structures for tunable lasers and tunable lasers. Background technique [0002] In the field of optical communication, a tunable laser (Tunable Laser, TL) refers to a laser whose output wavelength can be adjusted within a certain range. Monolithic integrated tunable laser has the advantages of small size and high integration, so it has become the mainstream technology in the field of optical communication. [0003] Taking the monolithic integrated Y-branch tunable laser as an example, such as figure 1 As shown, the monolithic integrated Y-branch tunable laser consists of a gain region, a phase region, a multi-mode interference (Multi-mode Interferometer, MMI) coupler, mirror structure 1 and mirror structure 2. The active gain region is generally a multiple quantum well (Multiple Quantum Well, MQW), which converts electrical energy into light energy when receiving electr...
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IPC IPC(8): H01S3/081
CPCH01S3/0812H01S3/081H01S5/02453H01S5/02461H01S5/0261H01S5/0612H01S5/06256H01S5/1003H01S5/125H01S5/34326H01S5/2045H01S5/2086H01S5/209H01S5/1007H01S5/1218
Inventor 武林陈宏民
Owner HUAWEI TECH CO LTD