40gbs-qpsk-modulationptical Complex Spectrum Analyzer Application Notes This application note proves the high efficiency of the Apex Technologies Optical Complex Spectrum Analyser AP2441B/AP2443B in measuring and testing any kind of usual modulation formats. Compared to a standard oscilloscope, the Optical Complex Spectrum Analyser AP2441B/AP2443B has a maximum bandwidth >6 THz due the complex spectral analysis principle giving access to the...
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Ultra High Resolution Optical Spectrum Analyser/Optical Complex Spectrum Analyser for Characterising and Evaluating Optical Frequency Comb Sources
Comb-pulse-and-chirp-measurement This paper is devoted to present the capacity of the Apex Technologies High Resolution Optical Spectrum Analyser/Optical Complex Spectrum Analyser to show clearly all the Optical Comb sidebands even with a few tens of MHz spacing. Two commercial Optical Frequency Comb Sources (OFCS) are evaluated by the equipment in order to verify the main specifications mentioned in OFCS datasheets... -
80Gb/s Multi-Level BPSK experiment with an InPMonolithic Source Based on Prefixed Optical Phase Switching
Multi-level BPSK phase and power sequence (upper), constellation with transitions and tributary eye (lower) of the generated 80Gb/s sign Improved-speed full-monolithic BPSK transmitter based on prefixed phase switching by fast Electro-Absorption Modulators has been realized on InP using a Selective Area Growth integrating circuit technology. It has been used in 80Gb/s multi-level BPSK format modulation experiments. Simplicity, speed scalability... -
Optical Complex Spectrum Analyser principle
Optical-complex-spectrum-anlyser-principle This paper explains clearly the patented method used by the Apex Technologies Optical Complex Spectrum Analyzer AP2441B/AP2443B developed in collaboration with France Telecom scientists. It is based upon a spectral analysis of the optical field; it extracts the amplitude and the phase of each frequency component (whereas classic optical spectrum analysers measure only the power spectral density, giving... -
Ultra High Resolution Optical Spectrum Analyser used for the generation of coherent Dual-Polarisation Multi-Band OFDM signals
Optical spectrum of a 100 Gbps DP-MB-OFDM measured by the High Resolution Optical Spectrum Analyser The Apex Technologies Ultra High Resolution Optical Spectrum Analyser is a high efficient tool for generating and adjusting coherent Dual-Polarisation Multi-Band Orthogonal Frequency Division Multiplexing (DP-MB-OFDM) signals. This paper shows an experimental comparison of the DP-MB-OFDM signals and Quadrature Phase Shift Keying QPSK for... -
64-QAM-encoded Optical OFDM signal spectrum measurement using High Resolution Optical Spectrum Analysers
Real-time 64-QAM-encoded OOFDM signal spectra at the output of the VCSEL intensity modulator with equal power loading and adaptive power loading using High Resolution Optical Spectrum Analyser. This paper shows the contribution of the Apex Technologies High Resolution Optical Spectrum Anlyser in evaluating low-cost, un-cooled vertical cavity surface-emitting lasers (VCSELs) as intensity modulators in real-time optical OFDM (OOFDM) transceivers. ... -
Ultra High Resolution Optical Spectrum Analyser used for Generation of Coherent Multi-Carrier Signals by Gain Switching of Discrete Mode Lasers
Expanded frequency optical comb spectrum measured by APEX Technologies High Resolution Optical Spectrum Analyser This paper shows the utility of the Apex Technologies High Resolution Optical Spectrum Analyser AP2040/AP2050 series in the generation of a highly coherent multi-carrier signals. It consists on eight clearly resolved 10.7GHz coherent sidebands generated within 3dB of the spectral envelope peak and with an... -
Gain Measurements of Fabry-Pérot InP/InGaAsP Lasers using an Ultra High Resolution Optical Spectrum Analyser
Typical example of a recorded subthreshold spectrum of a Fabry-Perot laser made with APEX Technologies ultra high resolution Optical Spectrum Analyser. This application note presents the time measurements of the optical gain in a semiconductor laser using the Apex Technolgoies High Resolution Optical Spectrum Analyser AP2040/AP2050 series. The high resolution allows for accurate gain measurements close to the lasing... -
High Resolution Optical Spectrum Analyser used for Experimental demonstration of 23.6-Gb/s OFDM with a colourless transmitter
Optical Spectrum of the 23.6-Gb/s OFDM signal measured with APEX Technologies High resolution Optical Spectrum Analyser This paper shows the great utility of the Apex Technologies High Resolution Optical Spectrum Analyser AP2040/AP2050 series in demonstrating a 23.6-Gb/s optical Orthogonal Freqency Division Multiplexing (OFDM) (20-Gb/s after coding) with a colourless transmitter, realised by optical IQ multiplexing. In combination with 8-QAM coding... -
Ultra High Resolution Optical Spectrum Analyser/Optical Complex Spectrum Analyser for Characterising and Evaluating Optical Frequency Comb Sources
Spectral measurement of a Comb with 20 MHz repetition frequency made by the APEX Technologies High Resolution Optical Spectrum Analyser This paper is devoted to present the capacity of the Apex Technologies High Resolution Optical Spectrum Analyser/Optical Complex Spectrum Analyser to show clearly all the Optical Comb sidebands even with a few tens of MHz spacing. Two commercial Optical Frequency...