1. NEWTON: NEw Widely Tunable lasers for Optical Networks Main Objective: To develop and experimentally investigate new types of widely tunable laser diodes.

2. Consortium You are watching: NEWTON: NEw Widely Tunable Lasers for Optical Networks Category: (please leave void) Interuniversity Micro Electronics Centre (IMEC) Intune Technologies Ltd. ADC Inc. Technical University Munich

3. Technical Approach (1) You are watching: NEWTON: NEw Widely Tunable Lasers for Optical Networks Category: (please leave void) reflector 1 Top view Cross sections n-InP p-InP n-InP p-InP Sampled Grating Y-branch laser

4. Technical Approach (2) You are watching: NEWTON: NEw Widely Tunable Lasers for Optical Networks Category: (please leave void) Sampled Grating Tunable Twin-Guide laser (SG- TTG laser) I 1t I 2t I a I a I t n-InP p-InP grating p-InP g2 L g1 L active tuning grating Longitudinal/tranverse structure Cross section

5. Technical Approach (3) You are watching: NEWTON: NEw Widely Tunable Lasers for Optical Networks Category: (please leave void) Sampled Grating Ring Resonator laser active section phase control reflector ring resonator Top view

6. Achievements/ Results I You are watching: NEWTON: NEw Widely Tunable Lasers for Optical Networks Category: (please leave void) The additive Vernier effect gives a high rejection of neighboring reflection peaks, compared to the multiplicative Vernier effect used in the SSG-DBR laser. Design of Sampled Grating Y-branch laser: 630GHz700GHz Multiplied specra Added specra

7. Modelling/Design of SG-TTG laser: Very strong mode rejection when Bragg peaks from two sections overlap and very simple tuning scheme. Achievements/ Results II You are watching: NEWTON: NEw Widely Tunable Lasers for Optical Networks Category: (please leave void) Wavelength vs. tuning currents Side mode rejection