The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We present a high-precision ranging and range-rate measurement system via an optical-ranging or combined ranging-communication link. A complete bench-top optical communication system was built. It included a ground terminal and a space terminal. Ranging and range rate tests were conducted in two configurations. In the communication configuration with 622 data rate, we achieved a two-way range-rate...
To adapt to the network dynamics and support elastic network resource allocation in the future elastic optical networks, optical transmitter with flexibility and re-configurability in modulation formats becomes indispensable, offering network providers flexibility in transport bandwidth. In this paper, we discuss our proposed two flexible high-order quadrature amplitude modulation (QAM) transmitter...
We demonstrate electro-optic dual-channel coherent signal emulator, where multiplexed signal is artificially generated by using an optical IQ modulator driven with an arbitrary-waveform generator. 2×20-Gb/s dual-carrier QPSK signal generation is emulated.
In order to adapt to the dynamics in the future optical networks, we propose and experimentally two flexible high-order quadrature amplitude modulation (QAM) transmitter schemes: i) a flexible transmitter using a tandem in-phase/quadrature (IQ) modulators for generating 16-/32-/64-QAM signals; and ii) a scheme based on monolithically-integrated quad Mach-Zehnder in-phase/quadrature (QMZ-IQ) with binary...
Laser-phase-fluctuation-insensitive optical coherent detection scheme with two-tone local light and digital signal processing technique for a radio-over-fiber (RoF) signal is proposed and experimentally demonstrated. Data recovery with the error vector magnitude of less than 14% rms is successfully performed for 10- and 2.5-Gbaud 25-GHz-band QPSK RoF signals. In addition, bit error rate of less than...
A digital-signal-processing-assisted optical coherent detection of an uplink radio-over-fiber signal with a two-tone local light, which is insensitive to laser phase noises, is newly proposed and its phase noise cancellation effect is experimentally demonstrated.
Instead of using eight-level electronics or highly-integrated optics, 64QAM generation is experimentally demonstrated using two tandem IQ modulators with four-level electronics. The complexity in electronics and optics is well-balanced. 16QAM and 36QAM are also synthesized.
By deploying duobinary-shaping and MLSD reception, we propose and implement a power-efficient superchannel consists of 32Gbaud PS-QPSK channels on a 25GHz grid, demonstrating 3.84-bit/s/Hz spectrum efficiency and 1.6-dB higher sensitivity than PM-QPSK superchannel.
Multi-tone coherent-matched detection is demonstrated for multi-channel reception of superchannel/OFDM signals without optical filters for channel selection. Assisted with MIMO equalization, interleaved 23×20Gb/s QPSK are orthogonally demultiplexed.
We propose and demonstrate an optical 32QAM transmitter, consisting of two tandem IQ modulators driven by binary and 3-level electronics. Compared with the single-IQ modulator scheme requiring 6-level electronics, the complexity in electronics is reduced.
Arbitrary 2-QAM is proposed and experimentally demonstrated using an under-driven IQ modulator. By cascading a standard QPSK modulator and a constant-amplitude or non-constant-amplitude 2-QAM, an optical 8PSK or 8QAM could be synthesized, respectively.
The optoelectronic measurement method is put forward to measure the height of the burst point in the air of bouncing projectile in this paper. This method builds the mathematical model by making use of the projectile doing the uniformly retarded motion after it bounces into the air. This method includes the instrument of sonic transducer, the light screen, the flame detector and the twin channel chronograph,...
An eight-ary phase-shift keying (8PSK) transmitter is proposed and experimentally demonstrated using two cascaded in-phase/quadrature (IQ) modulators. Error-free operation was achieved for generated 30-Gb/s optical 8PSK.
We propose and demonstrate an optical 8-ary phase-shift keying (8PSK) transmitter using tandem in-phase/quadrature (IQ) modulators. A 30-Gb/s 8PSK is successfully generated through cascading a rectangular quadrature phase-shift keying (QPSK) and a square QPSK.
We experimentally demonstrate an optical 16-QAM transmitter using a monolithically integrated quad-Mach-Zehnder in-phase/quadrature (QMZ-IQ) modulator with binary driving electronics.
We experimentally demonstrate a 16-QAM transmitter using a monolithically-integrated quad Mach-Zehnder in-phase/quadrature (QMZ-IQ) modulator with binary driving electronics.
An optical MSK transmitter was experimentally demonstrated using a single monolithically integrated high-speed quad-MZ IQ modulator. An 80-Gb/s binary MSK with compact spectrum was generated using the proposed transmitter with electronics designed for 40-Gb/s systems.
We propose and demonstrate a digital coherent detection scheme for demodulation of optical MSK signal. A 10-Gb/s MSK signal synthesized by using a quad Mach-Zehnder in-phase/quadrature modulator was experimentally demodulated by the detection scheme.
An optical MSK generation scheme is proposed using a single monolithically integrated high-speed quad-MZ IQ modulator, where four sub-MZMs are integrated on a main MZ superstructure. Simulation and experiment were performed to verify the scheme.
An optical MSK transmitter is proposed and experimentally demonstrated using a single monolithically integrated high-speed quad-MZ IQ modulator, where four sub-MZMs are integrated on a main MZ superstructure.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.