10,804 research outputs found
Using optical injection of Fabry-Perot lasers for high-speed access in optical telecommunications
conference 7720 " Semiconductor Lasers and Laser Dynamics ", Posters session [7720-83]International audienceIn this paper we present our recent works on optical injection of Fabry-Perot laser diode for application in access networks. The injection-locked Fabry-Perot laser diode is used as low-cost colorless transmitters for high-speed optical access exploiting wavelength-division-multiplexing technology. The modification of main characteristics of Fabry-Perot laser such as spectral properties, noise and modulation is shown in injection-locking regime. The strong dependence of these properties onto injection parameters is also given. Finally, the operation of injection-locked Fabry-Perot laser diode in a wavelength-division-multiplexed optical access system using a novel multi-wavelength master source based on quantum-dash mode-locked laser is presented and its transmission performances at 2.5Gb/s are reported
Discrete mode laser diodes with ultra narrow linewidth emission <3kHz
Ex-facet, free-running ultra-low linewidth (<3 kHz), single mode laser emission is demonstrated using low cost, regrowth-free ridge waveguide discrete mode Fabry-Perot laser diode chips
Stable CW Single-Frequency Operation of Fabry-Perot Laser Diodes by Self-Injection Phase Locking
Previously, single-frequency semiconductor laser operation using fiber Bragg gratings (FBG) has been achieved by two methods: (1) use of the FBG as the output coupler for an anti-reflection-coated semiconductor gain element; (2) pulsed operation of a gain-switched Fabry-Perot laser diode with FBG-optical and RF-electrical feedback. Here, we demonstrate CW single frequency operation from a non-AR coated Fabry-Perot laser diode using only FBG optical feedback
Tunable transform-limited pulse generation using self-injection locking of an FP laser
Wavelength-tunable, near transform-limited pulses have been generated using a Fabry-Perot laser diode coupled to a fiber loop containing a fiber Fabry-Perot resonator (FFPR) and a polarization controller. The ratio of transmitted to reflected light from the loop can be adjusted using the polarization controller. Single-mode operation of the gain-switched laser is achieved by self-injection locking, which is induced by light reflected from the fiber loop. The resulting output pulse has a time-bandwidth product of 0.4 and is tunable over about 15 nm by varying the tuning voltage of the FFPR
The Berkeley tunable far infrared laser spectrometers
A detailed description is presented for a tunable far infrared laser spectrometer based on frequency mixing of an optically pumped molecular gas laser with tunable microwave radiation in a Schottky point contact diode. The system has been operated on over 30 laser lines in the range 10â100 cm^â1 and exhibits a maximum absorption sensitivity near one part in 10^6. Each laser line can be tuned by ±110 GHz with first-order sidebands. Applications of this instrument are detailed in the preceding paper
Laser cooling of trapped ytterbium ions with an ultraviolet diode laser
We demonstrate an ultraviolet diode laser system for cooling of trapped
ytterbium ions. The laser power and linewidth are comparable to previous
systems based on resonant frequency doubling, but the system is simpler, more
robust, and less expensive. We use the laser system to cool small numbers of
ytterbium ions confined in a linear Paul trap. From the observed spectra, we
deduce final temperatures < 270 mK.Comment: submitted to Opt. Let
Passive harmonic mode-locking by mode selection in Fabry-Perot diode lasers with patterned effective index
We demonstrate passive harmonic mode-locking of a quantum well laser diode
designed to support a discrete comb of Fabry-Perot modes. Spectral filtering of
the mode spectrum was achieved using a non-periodic patterning of the cavity
effective index. By selecting six modes spaced at twice the fundamental mode
spacing, near-transform limited pulsed output with 2 ps pulse duration was
obtained at a repetition rate of 100 GHz.Comment: 3 page
Detailed comparison of injection-seeded and self-seeded performance of a 1060nm gain-switched Fabry-Perot laser diode
We investigate and compare the performance of a gain-switched picosecond Fabry-Perot laser diode operated at 1.06 ”m under both injection- and self-seeded conditions. Our experiments show that comparable performance can be obtained for both modes of operation, with the self-seeding arrangement offering overall benefits in terms of reduced system complexity and cost, providing the associated quantization of available pulse repetition rate can be tolerated
- âŠ