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.
A 1550nm external-cavity hybrid III-V/SOI laser with a room-temperature threshold current of 18mA and output powers up to 4mW was demonstrated with a novel assembly technique. An edge-coupled 1×6 laser array was passively aligned with sub-micron positional tolerance.
Monolithic integration of a photonic crystal laser and a passive waveguides via selective quantum well etching are demonstrated. Coupling efficiency between photonic crystal cavity and waveguide is investigated numerically.
We report efficient sum-frequency generation of a Yb fiber laser at 1064 nm and an Er, Yb fiber laser at 1550 nm by employing a bow-tie resonant cavity system.
Two kinds of transmission-resonant structure are described: transmission-resonant aperture type and transmission-resonant cavity type. The transmission cross sections at resonance are found to be (2G/4π)λ2 [m2] (G:gain) for both structures. It is also seen that a single transmission-resonant aperture structure, like a ridged circular aperture, can be synthesized with input and output coupling irises...
The wavelength shift of transmission resonance was achieved by a tapered metallic slit. We simulated the transmission and reflection of the tapered slit structure with the tapered slit width of 0.25, 0.5, 0.75 and 1 mm. The tapered slit angle shifted higher the resonance frequency, by which the cavity resonant length became shorter.
Cable joint is used to connect different sections of cable because a cable section is limited to a certain length. The design of a cable joint mainly depends on the cable type, the applied voltage and the cores. These factors contribute to the way of how electric field stress is distributed at the cable joint. If there are defects exist within the cable joint insulation material, the electric field...
High mode confinement and modal sparsity in subwavelength metallic-plasmonic coaxial cavities enable the demonstration of continuous-wave and room-temperature lasing at telecommunication wavelengths in the smallest cavities to date.
One-dimensional nanobeam lasers in which the width of waveguide is parabolically tapered are explained in detail. In the vicinity of the tapered region where Gaussian photonic well is formed, a few high-Q resonant modes are experimentally confirmed. It is also found that the far-field radiation profile is closely associated with the symmetry of the structure.
This paper shows that it is possible to build a stable cw optical parametric oscillators from MgO doped periodically poled lithium niobate pumped at 532 nm by a single-mode DPSS (diode-pumped solid-state) laser. The ring cavity is resonant for the signal wave and one mirror is mounted on a piezo-actuator for scanning and controlling the cavity length. The temperature controlled, 40 mm-long MgO:PPLN...
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.