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...

AI Technical Summary

Problems solved by technology

The current optical communication system of ROADM requires the optical output power of the tunable laser to be 0dBm or greater, so the disclosed technology does not meet the requirements of the system

[0016] In addition, the flip-chip laser diode mounting technique proposed by G. Jeong et al. requires a very small waveguide core height of 4.5 μm, making it very difficult to mount the laser diode to give uniform coupling efficiency

Therefore, laser diode mounting technology has the problem of low yield during mass production

In addition, because the laser diode chip of the external cavity-based laser proposed by G.

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