Author Affiliations
Abstract
School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
A novel 1 kHz single-frequency, Q-switched Er-doped yttrium aluminum garnet (Er:YAG) laser pumped by a 1470 nm laser diode is demonstrated. The 500 ns, 5.52 mJ single-frequency, diffraction-limited pulses are obtained by using a ‘ramp-fire’ injection-seeding technique and an optical feedback architecture. The full width at half-maximum of the pulse spectrum is measured to be 1.47 MHz by using the heterodyne technique. The beam quality M2 factors are measured to be 1.18 and 1.24 in the x and y directions, respectively.
140.3520 Lasers, injection-locked 140.3280 Laser amplifiers Chinese Optics Letters
2019, 17(3): 031402
Author Affiliations
Abstract
1 LTCI, Télécom Paristech, Université Paris-Saclay, 46 rue Barrault, 75013 Paris, France
2 COPL, Université Laval, 2375 rue de la Terrasse, Québec, Québec G1V 06A, Canada
3 Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, New Mexico 87106-4343, USA
The effects of gain compression on the modulation dynamics of an optically injected gain lever semiconductor laser are studied. Calculations reveal that the gain compression is not necessarily a drawback affecting the laser dynamics. With a practical injection strength, a high gain lever effect and a moderate compression value allow us to theoretically predict a modulation bandwidth four times higher than the free-running one without a gain lever, which is of paramount importance for the development of directly modulated broadband optical sources compatible with short-reach communication links.
Semiconductor lasers Modulation transfer function Lasers, injection-locked Nonlinear optics, integrated optics Photonics Research
2017, 5(4): 04000315
Author Affiliations
Abstract
1 Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Science, Beijing 100083, China
2 Tsinghua National Laboratory for Information Science and Technology, State Key Laboratory of Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
We experimentally demonstrate all-optical clock recovery for 100 Gb/s return-to-zero on–off keying signals based on a monolithic dual-mode distributed Bragg reflector (DBR) laser, which can realize both mode spacing and wavelength tuning. By using a coherent injection locking scheme, a 100 GHz optical clock can be recovered with a timing jitter of 530 fs, which is derived by an optical sampling oscilloscope from both the phase noise and the power fluctuation. Furthermore, for degraded injection signals with an optical signal-to-noise ratio as low as 4.1 dB and a 25 km long distance transmission, good-quality optical clocks are all successfully recovered.
070.6020 Continuous optical signal processing 140.3520 Lasers, injection-locked Chinese Optics Letters
2016, 14(3): 030604
Author Affiliations
Abstract
1 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 University of Chinese Academy of Science, Beijing 100049, China
In order to realize homodyne reception and Doppler frequency shift tracking in ground-to-satellite coherent laser communication, a local laser is experimentally demonstrated in this Letter. It is realized based on modulation-sideband injection locking, and has a 10 GHz tuning range, a 1 THz/s tuning rate, a 5 kHz linewidth, and 16 mW of output power. When applied to a Costas loop in a coherent laser communication system, the local laser can achieve Doppler frequency shift tracking with a 20 MHz/s frequency shift rate, which is sufficient for the ground-to-satellite coherent laser communication.
140.3600 Lasers, tunable 140.3520 Lasers, injection-locked 230.2090 Electro-optical devices 060.1660 Coherent communications Chinese Optics Letters
2015, 13(9): 091402
Author Affiliations
Abstract
An all-optical clock recovery scheme based on monolithic amplified feedback DFB laser (AFL) diode is proposed for nonreturn-to-zero (NRZ) quadrature phase shift keying (QPSK) format signals. By using a preprocessing stage, clock recovery (CR) is successfully demonstrated for 40-Gbaud NRZ-QPSK signals based on this scheme. The dependence of the timing jitter of the recovered clock on the optical power of the injected signal is investigated. A minimum timing jitter of 362.8 fs (integrated within a frequency range from 10 Hz to 10 MHz) is obtained.
140.3520 Lasers, injection-locked 230.1150 All-optical devices Chinese Optics Letters
2014, 12(8): 081402
Author Affiliations
Abstract
Enhancing resonance frequency of strong optical injection-locked semiconductor lasers is experimentally studied. Resonance frequency is increased from 4.1 to 53.9 GHz by the optical injection locking (OIL) technique. We experimentally demonstrate that resonance frequency is strictly equal to the frequency spacing between the cavity modes of the master and slave lasers under strong OIL condition. This result provides valuable information to improve OIL theory.
140.3520 Lasers, injection-locked 250.5960 Semiconductor lasers Chinese Optics Letters
2013, 11(12): 121403
Author Affiliations
Abstract
We demonstrate the long distance transmission of single-carrier frequency division multiple address signals by directly-modulated optically injection-locked vertical-cavity surface-emitting laser. Transmission distance as long as 50 km is achieved at 5 Gb/s (2.5 Gb/s for each user) through data pattern inversion and higher frequency response gain under optical injection locking.
140.3520 Lasers, injection-locked 250.7260 Vertical cavity surface emitting lasers Chinese Optics Letters
2012, 10(9): 091407
Author Affiliations
Abstract
An injection-locked Ti:sapphire laser is developed, with injection locking achieved using the Pound-Drever-Hall technique. By measuring the dependence of output power on the pump power with various Ti:sapphire laser parameters, we experimentally studied the influences of the ring cavity length, the focal length of the pump-laser mode-matching lens, and the output–coupler transmission on the threshold and slope efficiency. The dependence of the output power on the master laser power is also investigated. The present study provides a guideline for developing a Ti:sapphire laser with high slope efficiency and low threshold.
140.3520 Lasers, injection-locked 140.3425 Laser stabilization 140.3518 Lasers, frequency modulated Chinese Optics Letters
2011, 9(12): 121401
Author Affiliations
Abstract
A new scheme to realize terahertz (THz) radiation generation, as well as high-speed THz modulation, for future high-speed THz communication systems, is proposed and discussed. The proposed experimental scheme includes two elemental parts: dual-wavelength mode-locking oscillating cavity and photomixing elements. The conditions for double-wavelength operation using the proposed experimental setup have been theoretically discussed and obtained. The mode-locked output optical short pulses with two highstability wavelengths are obtained and demonstrated. These can be used to produce THz radiation, as well as high-speed signal modulation, through the photomixing effects in an ultrafast oxygen-ion-implanted and epitaxial InGaAs:O for the future high-speed THz communication systems.
060.2390 Fiber optics, infrared 140.3520 Lasers, injection-locked 140.3560 Lasers, ring Chinese Optics Letters
2011, 9(s1): s10205
Author Affiliations
Abstract
Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
A conductively cooled, laser diode (LD) end-pumped, injection-seeded single-frequency Nd:YAG laser is designed and implemented. The laser is capable of producing an 8-mJ Q-switched pulse with a 11-ns pulse width at 1 064 nm and at a pulse repetition rate of 1 000 Hz. At the maximum output energy of 8 mJ, the frequency jitter is less than 3.5 MHz (root mean square (RMS)) over two minutes, and the linewidth is around 54.2 MHz. The M2 of the laser beam is approximately 1.30 in both horizontal and vertical directions. The optimized ramp-fire technique is applied to build reliable single longitudinal mode oscillating.
单频 Nd:YAG激光器 谐振探测技术 140.3520 Lasers, injection-locked 140.3540 Lasers, Q-switched 140.3570 Lasers, single-mode Chinese Optics Letters
2011, 9(8): 081405
