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Phase coupling reflection grating feedback-based wavelength tunable laser

A technology for tuning lasers and phase coupling, which is applied to the structure of optical resonators, etc., can solve the problems that DFB lasers do not have a wavelength tuning range, expensive costs, etc., achieve obvious performance and price advantages, and avoid the effect of assembly process

Active Publication Date: 2012-04-11
李若林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, DFB lasers do not have a wide wavelength tuning range, therefore, different lasers must be used for each wavelength, which results in expensive wavelength management costs, and requires a large surplus inventory to solve laser failures at any time, etc. question

Method used

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  • Phase coupling reflection grating feedback-based wavelength tunable laser
  • Phase coupling reflection grating feedback-based wavelength tunable laser
  • Phase coupling reflection grating feedback-based wavelength tunable laser

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Embodiment Construction

[0037] like figure 1 As shown, the schematic diagram of the top view structure of Embodiment 1 of the present invention includes an active gain chip 4, which is used to generate broadband spontaneous emission photons as an excitation light source; a passive photonic chip 5, which provides wavelength tunable Feedback to generate laser output with tunable wavelength. The optical waveguides of the active gain chip and the passive photonic chip each have a waveguide core 3, 12; the docking of the active gain chip 4 and the passive photonic chip 5 is carried out by accurately aligning the waveguide cores 3, 12 on each chip. Optical alignment is achieved for optimal coupling. The left and right end faces of the gain chip 4 are coated with high reflection film 2 and anti-reflection film 1, and the two end faces 15, 16 of the passive photonic chip 5 optical waveguide are coated with anti-reflection film, and the laser light will be emitted from the right end face of the passive photo...

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Abstract

The invention discloses a phase coupling reflection grating feedback-based wavelength tunable laser, which comprises an active gain chip and a passive photonic chip, wherein optical waveguides are arranged in the active gain chip and the passive photonic chip respectively; the two chips are coupled and butted with each other through a waveguide core; the waveguide on the passive photonic chip comprises a laser phase control part and a compound waveguide reflecting mirror part; the compound waveguide reflecting mirror part comprises a first reflecting mirror section, a phase coupling section and a second reflecting mirror section; each section is provided with a corresponding electrode for changing the waveguide refraction rate; and by alternatively or simultaneously changing the waveguiderefraction rates of the first reflecting mirror region and the second reflecting mirror region, the distribution wavelength positions of the reflection peaks of the two reflecting mirror regions are changed. Due to the adoption of the wavelength tunable laser, the output wavelength can be continuously or selectively changed, stepped or continuous tuning of the laser output wavelength is realized,and a wide wavelength range can be covered.

Description

technical field [0001] The invention relates to a semiconductor laser, in particular to a wavelength tunable laser based on phase-coupling reflection grating feedback. Background technique [0002] Wavelength Division Multiplexing (WDM) has been widely used in fiber optic communication systems. A wavelength division multiplexed optoelectronic transponder consists of a laser, a modulator, a receiver and associated electronics. The operation of the WDM converter can be realized by a fixed wavelength laser in the near infrared wavelength of 1550nm. Due to the ease of operation and high reliability, distributed feedback (DFB) lasers are widely used in WDM transmission systems. In the DFB laser, the diffraction grating that provides optical feedback is located above the entire gain resonant cavity, so that the laser will obtain a stable single-mode oscillation at a fixed wavelength. Also, information transmission at low digital rates can also be achieved by directly modulating...

Claims

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Application Information

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IPC IPC(8): H01S5/12H01S5/14
Inventor 李若林
Owner 李若林
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