Tunable bragg grating and tunable laser diode using same

一种布拉格光栅、激光二极管的技术，应用在激光器、半导体激光器、激光器零部件等方向，能够解决过度复杂波导结构、干涉波导光学功能等问题，达到连续调谐的效果

Active Publication Date: 2014-01-22
LUMENTUM OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Multiple legs are used in the Cunningham setup to support the suspended waveguide along its length, but these lead to an overly complex waveguide structure and / or can interfere with the optical function of the waveguide

Method used

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  • Tunable bragg grating and tunable laser diode using same
  • Tunable bragg grating and tunable laser diode using same
  • Tunable bragg grating and tunable laser diode using same

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Embodiment Construction

[0048] While the present teachings are described in conjunction with various embodiments and examples, the present teachings are not intended to be limited by such embodiments. On the contrary, it will be understood by those skilled in the art that the present teachings encompass various alternatives, modifications and equivalents.

[0049] refer to Figure 1A and Figures 2A to 2C , a SG-DBR laser 120 of the present invention includes: a front tunable Bragg grating (DBR) 100 and a rear tunable Bragg grating 100 , a gain section 126 , and an optional phase section 160 . In the illustrated embodiment, the Bragg grating 100, gain section 126, and phase section 160 are all part of a ridge waveguide structure that has a common top ridge 115 for providing light Die 108 guides.

[0050] The Bragg grating 100 includes a first substrate portion 102, spaced-apart first support rods 104 and second support rods 104 extending upwardly from the first substrate portion 102, a first ridge ...

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Abstract

The invention provides a tunable bragg grating and a tunable laser diode using same. A spatially modulated waveguide Bragg grating mirror is suspended over a substrate by plurality of fingers extending laterally away from the waveguide centerline. The positions of the fingers are coordinated with the positions of crests and valleys of amplitude or phase modulation of the Bragg grating, to avoid disturbing the Bragg grating when it is tuned by heating. When the Bragg grating is heated, the heat flows through the fingers creating a quasi-periodic refractive index variation along the Bragg grating due to quasi-periodic temperature variation created by the heat flow from the grating through the supporting fingers. Due to coordination of the positions of supporting fingers with positions of the crests and valleys of modulation, the optical phase coherence is maintained along the Bragg grating, so that the spectral lineshape or filtering property of the Bragg grating is substantially preserved.

Description

technical field [0001] The present invention relates to optical waveguides and lasers, and in particular to structures and methods for tuning optical waveguide gratings in lasers. Background technique [0002] A laser diode includes a p-n junction between a pair of mirrors for optical feedback of light generated and amplified at the p-n junction when a forward current is applied to the p-n junction. To provide wavelength tunability, the mirrors are wavelength selective and the reflected wavelength of at least one of the mirrors is tuned. [0003] In waveguide laser diodes, waveguide gratings are often used as wavelength-selective mirrors. In a waveguide grating, periodic perturbations of the effective index of refraction of the waveguide are generated to selectively reflect light at wavelengths corresponding to the spatial frequencies of the periodic index of refraction perturbations. Waveguide gratings can be tuned by heating or, for waveguide gratings formed at p-n junct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/125
CPCH01S5/02461H01S5/0612H01S5/06256H01S5/1209H01S5/1234H01S5/1237H01S5/22G02B2006/12097G02B2006/12107G02B2006/12176
Inventor 迈克尔·C·拉尔森
Owner LUMENTUM OPERATIONS LLC
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