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Hybrid integrated composite cavity wave length-tunable laser transmitter

A laser transmitter, hybrid integration technology, applied in the direction of lasers, phonon exciters, laser components, etc., can solve the problems of large device size, product yield and output limitations, and achieve the effect of reducing size

Active Publication Date: 2013-12-18
马亚男
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing solutions, the tunable lasers, amplifiers, intensity modulators and other completely different growth structures are realized on the same chip; Yield and output are constrained
In addition, because wavelength tuning, optical amplification, output signal modulation and other functions are realized in sequence on the same waveguide device, the required waveguide is longer, so that the size of the entire device will be larger

Method used

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  • Hybrid integrated composite cavity wave length-tunable laser transmitter
  • Hybrid integrated composite cavity wave length-tunable laser transmitter
  • Hybrid integrated composite cavity wave length-tunable laser transmitter

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Embodiment Construction

[0033] like figure 1 As shown, it is a schematic diagram of the top view structure principle of the present invention, which includes an active gain chip 4, which is used to generate broadband spontaneous emission photons as an excitation light source; a passive photonic chip 24, which provides wavelength tunable feedback as an external cavity, generates Laser output with tunable wavelength, output modulation of laser intensity and monitoring of laser output power.

[0034] Each of the optical waveguides of the active gain chip 4 and the passive photonic chip 24 has a waveguide core 3, 17; the docking of the active gain chip 4 and the passive photonic chip 24 is carried out by connecting the waveguide core 3, 17 on each chip Precise optical alignment is achieved for optimal coupling. The left and right end faces of the active gain chip 4 are coated with a high reflection film 1 and an antireflection film 2, and the two end faces 22, 23 of the passive photonic chip 24 optical ...

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Abstract

The invention discloses a hybrid integrated composite cavity wave length-tunable laser transmitter. Optical waveguides of a passive photonic chip sequentially comprise phase control regions, a first reflection grating, a phase coupling region and a second reflection grating, and a tunable laser outer cavity is formed by the phase control regions, the first reflection grating, the phase coupling region and the second reflection grating. Optical waveguides connecting the phase coupling regions are Y-branch waveguide couplers of two asymmetrical waveguide arms, wherein the second reflection grating is arranged on one waveguide arm, and a waveguide laser intensity modulator is arranged on the other waveguide arm; tunable lasers are output from the middle of a composite reflection mirror in a light split mode, and is then transmitted and output at the speed modulated according to the laser intensity of the lasers from a port of the waveguide arm provided with the waveguide laser intensity modulator. Because the second reflection grating and the waveguide laser intensity modulator are arranged on the two Y-branch waveguide couplers of the two asymmetrical waveguide arms respectively, the size of the hybrid integrated composite cavity wave length-tunable laser transmitter is reduced; the waveguide laser intensity modulator can achieve high-speed laser transmission.

Description

technical field [0001] The invention relates to a semiconductor laser, in particular to a hybrid integrated composite cavity wavelength tunable laser emitter. 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 at 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 the DFB ...

Claims

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Application Information

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IPC IPC(8): H01S5/187H01S5/06
Inventor 李若林
Owner 马亚男
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