Integrated dual-wavelength AWG laser for sub-terahertz wave generation

We present a monolithically integrated ring dual-wavelength semiconductor laser in which both wavelengths (¿1 and ¿2) are generated and amplified by the same semiconductor optical amplifier (SOA). An arrayed waveguide grating (AWG) is used as intra-cavity filter to combine the two wavelengths. The use of a Mach-Zehnder construction allows equalizing actively the power of ¿1 and ¿2 and tuning their frequencies. An analytical model is exploited to investigate the influence of crosstalk on the functioning of the device and to identify a calibration strategy. The device has been fabricated using active/passive integration technology on a standardized photonic integration platform

On-chip mode-locked laser diode structure using multimode interference reflectors

We report, for the first time to our knowledge, an on-chip mode-locked laser diode (OCMLLD) that employs multimode interference reflectors to eliminate the need of facet mirrors to form the cavity. The result is an OCMLLD that does not require cleaved facets to operate, enabling us to locate this OCMLLD at any location within the photonic chip. This OCMLLD provides a simple source of optical pulses that can be inserted within a photonic integrated circuit chip for subsequent photonic signal processing operations within the chip (modulation, optical filtering, pulse rate multiplication, and so on). The device was designed using standardized building blocks of a generic active/passive InP technology platform, fabricated in a multi-project wafer run, and achieved mode-locking operation at its fundamental frequency, given the uncertainty at the design step of the optical length of these mirrors, critical to achieve colliding pulse mode-locked operation. © 2014 Chinese Laser Pres

Traveling wave model of an AWG-based multiwavelength laser

This work presents a traveling wave model description of an arrayed waveguide grating (AWG) based multiwavelength laser. The purpose is to design a device with frequency spacing of 70 GHz between channels at 1550 nm central wavelength, aiming to dimension the required channel bandwidth to achieve a target side mode suppression ratio (SMSR) among longitudinal modes

Characterisation of thermal crosstalk-induced wavelength shift in a monolithic InP dual DFB lasers PIC

We present dual DFB lasers each integrated with one heater developed in a generic foundry platform. The thermal effects are experimentally investigated and exhibited a continuous wavelength difference tuning of 0-12.33 nm

Colliding Pulse Mode-Locked Laser Diode using Multimode Interference Reflectors

We present a novel fully monolithic Colliding Pulse Mode-Locked Laser Diode (CPML) using Multimode Interference Reflectors (MMIRs) to create the laser resonator. We demonstrate experimentally for the first time to our knowledge the Colliding Pulse mode-locking of a laser using MMIRs by observation of the Optical Spectrum and by measuring the frequency spacing between the modes. This component is a promising candidate for Stable Millimeter-Wave Generation in ultra-wideband wireless communication links. Multimode Interference Reflectors are very versatile components that allow avoiding the required cleaved facets to operate

Characterisation of monolithically integrated dual wavelength AWG-lasers for mm-wave generation

In this paper we present characterisation results of monolithically integrated InP based quantum well dual wavelength lasers in which an Array Waveguide Grating (AWG) is used as intra-cavity filter to allow lasing on two wavelengths within a common optical amplifier of the device. The devices require accurate control of the optical loss of each wavelength which is achieved through the use of Michelson interferometers (MIs) in the cavity. The results show that reasonably stable dual wavelength operation is possible with a side mode suppression ratio better than 20dB for each of the two wavelengths without fast active feedback control

Integrated dual wavelength lasers for millimeter wave generation

We have designed integrated dual-wavelength lasers in which an array waveguide grating is used as intra-cavity filter to allow lasing on two wavelengths within a common arm of the device. The devices have been designed with the purpose to exploit the beating of the two wavelengths on a photodiode in order to generate a 70GHz carrier wave. The use of a common SOA to amplify both wavelengths is promising for reducing the variations in frequency difference between the two operating laser modes. Both linear and ring configuration have been explored

Mecanismos formales e informales para el reconocimiento de nuevos derechos y la disfuncionalidad del sistema interamericano de derechos humanos

The acknowledgement of new rights and human rights standards in the context of the Inter-American System of Human Rights had followed different logics. This paper categorizes formal and informal mechanisms regarding the inter-american legal framework and the jurisprudence of its organs. Here we propose a critical analysis of the progress of the inter- american system of human rights’ mechanisms and its debated democratic legitimacy.El reconocimiento de nuevos derechos y estandares de derechos humanos en el ambito del sistema interamericano de derechos humanos ha seguido distintas logicas. En este articulo categorizamos mecanismos formales e informales a partir de un estudio del marco juridico interamericano yla jurisprudencia de sus organos. Este análisis crítico pretende reflexionar sobre el avance de estos mecanismos dentro del sistema interamericano y su discutida legitimidad democrática

Comparison of Monolithic Optical Frequency Comb Generators Based on Passively Mode-Locked Lasers for Continuous Wave mm-Wave and Sub-THz Generation

In this paper, two different Passive Mode-Locked Laser Diodes (PMLLD) structures, a Fabry-Perot cavity and a ring cavity laser are characterized and evaluated as monolithic Optical Frequency Comb Generators (OFCG) for CW sub-THz generation. An extensive characterization of the devices under study is carried out based on an automated measurement system that systematically evaluates the dynamic characteristics of the devices, focusing on the figures of merit that define the optimum performance of a pulsed laser source when considered as an OFCG. Sub-THz signals generated with both devices at 60 GHz and 90 GHz are presented and analyzed in terms of electrical linewidth to compare such components for mm-Wave and sub-THz photonic generation. This work offers a systematic comparison of PMLLD devices for OFCG operation and provides reference information of the performance of two different device topologies that can be used for the implementation of photonic integrated sub-THz CW generation.We acknowledge COBRA Research Institute, Eindhoven University of Technology, the Netherlands for the fabrication of the ring lasers within the joint European platform for InP-based components and circuits, JePPIX.Publicad

MC4.3 - Optically Coupled Mode-Locked Laser Array for Spectroscopy in InP Generic Integration

We propose a two-element mode-locked laser array operating at 1.56 µm. Optical pulses with 14.5-ps width, spectral bandwidth exceeding 7 nm, and RF line width of 260 kHz at 12.448 GHz are experimentally reported