Tunable laser module based on polymer waveguides

Abstract

The present invention relates to a laser module based on a waveguide tunable in a broad wavelength band. More specifically, the laser module comprises: a broadband light source based on an external resonator that generates optical signals; a waveguide; at least one Bragg grating formed on the waveguide; an optical lens provided between the light source and the waveguide; a first temperature controlling device configured of a thin film heater; and a second temperature controlling device that includes a temperature sensor and a thermoelectric cooler, wherein the light output from the light source being condensed through the optical lens and input to the waveguide, and a reflecting band of the Bragg grating is controlled by a thermo-optic effect, and an oscillation wavelength is controlled bya second temperature controlling device independently of external temperature environment.

Description

technical field

[0001] The present invention relates to polymer waveguide based tunable laser modules. Background technique

[0002] The wavelength division multiplexing (WDM) optical communication technology currently applied to most backbone networks and metropolitan area networks is a method of transmitting multiple high-speed signals to the technology on the light path. The transmission network according to the WDM scheme actually needs an Optical Add / Drop Multiplexer (OADM: Optical Add / Drop Multiplexer) capable of selectively branching / coupling certain optical wavelengths without performing photoelectric conversion and passing certain wavelengths. )Function. The OADM is connected between intermediate nodes in a transmission line existing in a wavelength unit, enabling expansion of connectivity of a network and improvement of network efficiency. ROADM (Reconfigurable OADM) can reconfigure branch / coupling wavelengths, and can effectively remotely reconfigure the wavele...

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