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Schmidt-Langhorst, R. Bonk, H. Schmeckebier, D. Fiol, A. Galperin, J. Leuthold, C. Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here. Alert me when this article is cited. Click here to see a list of articles that cite this paper. Allow All Cookies. Optics Express Vol. Open Access. Dorren, "Ultrahigh-speed and widely tunable wavelength conversion based on cross-gain modulation in a quantum-dot semiconductor optical amplifier," Opt.
Express 19 , BB The topics in this list come from the Optics and Photonics Topics applied to this article. Introduction 2.
Experimental setup 4. Experimental results 5. Summary References and links. Abstract We present ultrahigh-speed and full C-band tunable wavelength conversions using cross-gain modulation in a quantum-dot semiconductor optical amplifier QD-SOA. Introduction All-optical wavelength converter AOWC will be a key device for wavelength-routed optical networks based on wavelength-division-multiplexing WDM transmission systems [ 1 , 2 ].
References and links 1. Previous Article Next Article. Akiyama, T. Figures 7. Journal Home. Issues in Progress. Current Issue. All Issues. Feature Issues. Please login to set citation alerts. Equations displayed with MathJax. Wavelength-tunable laser sources have many applications , some examples of which are:. Among them:. Here you can submit questions and comments.
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These sharing buttons are implemented in a privacy-friendly way! Sorry, we don't have an article for that keyword! Some types of lasers offer particularly broad wavelength tuning ranges: A few solid-state bulk lasers see Figure 1 , in particular titanium—sapphire lasers and Cr:ZnSe and Cr:ZnS lasers allow tuning over hundreds of nanometers in the near- and mid- infrared spectral region. In general, transition-metal doped laser gain media offer larger tuning ranges than rare-earth-doped laser gain media , since the electrons involved in such media interact more strongly with the host lattice; see the article on vibronic lasers.
Output powers can be hundreds of milliwatts or even multiple watts. Dye lasers also allow for broadband tunability. Different dyes can cover very broad wavelength ranges, e. There are narrow-linewidth dye laser systems continuous-wave or pulsed for use in laser spectroscopy , and also mode-locked dye lasers generating femtosecond pulses. Some free electron lasers can cover enormously broad wavelength ranges, and often in extreme spectral regions.
Figure 1: Setup of a tunable solid-state bulk laser, realized e. The prism pair spatially disperses the different wavelength components, so that the movable slit can be used to shift the wavelength away from that of maximum gain. Other types of lasers offer tuning ranges spanning a few nanometers to some tens of nanometers: Rare-earth-doped fiber lasers , e.
Most Raman fiber lasers also have the potential for wideband tuning. Some rare-earth-doped laser crystals , often doped with ytterbium , also allow for substantial tuning ranges of bulk lasers. Color center lasers rely on broadband gain from certain lattice defects in a crystal, which can be generated e.
They are not widely used, however. Most laser diodes can be tuned over a few nanometers by varying the junction temperature, but some special types such as external-cavity diode lasers and distributed Bragg reflector lasers can be tuned over 40 nm and more with additional means such as an intracavity diffraction grating. Quantum cascade lasers are also broadly tunable mid-infrared laser sources. Some fine tuning, often continuously without mode hops, is possible for other lasers: Some compact solid-state bulk lasers such as nonplanar ring oscillators NPROs, MISERs allow continuous tuning within their free spectral range of several gigahertz.
Tuning may be accomplished by applying stress to the laser crystal via a piezo, or by varying the crystal temperature. Similar fine tuning is possible with some single-frequency laser diodes , e. Wavelength-tunable laser sources have many applications , some examples of which are: In laser absorption spectroscopy , a wavelength-tunable laser with narrow optical bandwidth can be used for recording absorption spectra with very high frequency resolution.
In a LIDAR system, a laser may be tuned to a wavelength which is specific to a certain substance to be monitored. Various methods of laser cooling require a laser wavelength to be adjusted very precisely at or near some atomic resonance. Tuning to atomic resonances is also used in laser isotope separation. The laser is then tuned to a particular isotope in order to ionize these atoms and subsequently deflect them with an electric field.
A tunable laser can be used for device characterization, e.
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