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Semiconductor optical gain

About: Semiconductor optical gain is a research topic. Over the lifetime, 5997 publications have been published within this topic receiving 96505 citations.


Papers
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Patent
13 Jun 1990
TL;DR: In this paper, a distributed feedback structure including a diffraction grating was proposed to reduce spectral line widths, while improving single-mode spectral oscillation characteristics in a very high-speed modulating semiconductor laser.
Abstract: A wavelength-tunable semiconductor laser device presenting a large wavelength-tunable range or a very-high-speed modulating semiconductor laser device having a distributed feedback structure including a diffraction grating as in the case of a DBR laser or a DFB laser incorporates therein a plurality of active layers differing from one another in constituent elements or composition ratio or thickness for reducing spectral line widths, while improving single-mode spectral oscillation characteristics.

47 citations

Journal ArticleDOI
TL;DR: In this article, an all-optical memory with three states is presented, where the state of the memory is determined by the wavelength of the output light, and only one wavelength is dominant.
Abstract: An all-optical memory with three states is presented. The memory is realized from three coupled ring lasers. The state of the optical memory is determined by the wavelength of the memory's output light. In each state, only one wavelength is dominant. The three-state all-optical memory can be utilized in all-optical packet switches. The concept of the memory is explained and experimental results are presented that demonstrate that a contrast ratio larger than 40 dB between output states of the memory can be obtained.

47 citations

Journal ArticleDOI
TL;DR: Room temperature quantum-well semiconductor optical amplifier with large input power is utilized in both the absorption and gain regime as an optical group delay and advance (slow and fast light), respectively, explaining the slow-to-fast light switching.
Abstract: Room temperature quantum-well semiconductor optical amplifier with large input power is utilized in both the absorption and gain regime as an optical group delay and advance (slow and fast light), respectively. Material resonance created by coherent population oscillation and four wave mixing is tuned by electrical injection current, which in turn controls the speed of light. The four-wave mixing and population oscillation model explains the slow-to-fast light switching. Experimentally, the scheme achieves 200 degrees phase shift at 1 GHz, which corresponds to 0.56 delay-bandwidth product. The device presents a feasible building block of a multi-bit optical buffer system.

47 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental demonstration of chaotic masking, transmission, and recovery of a 3.5GHz message using an external-cavity semiconductor laser operating at 1550 nm is presented.
Abstract: We report an experimental demonstration of chaotic masking, transmission, and recovery of a 3.5-GHz message using an external-cavity semiconductor lasers operating at 1550 nm.

47 citations

Journal ArticleDOI
TL;DR: In this article, an organic semiconductor distributed feedback laser with a continuously tunable wavelength from 621 to 657 nm was presented, with thresholds as low as 38μJ/cm2.
Abstract: We report on an organic semiconductor distributed feedback laser with a continuously tunable wavelength from 621 to 657 nm on a single sample with thresholds as low as 38 μJ/cm2. Using laser interference lithography and reactive ion etching, we textured a glass substrate with a one-dimensional second-order Bragg surface grating. Optical confinement and gain is provided by a wedge-shaped layer of the organic semiconductor tris(8-hydroxyquinoline) aluminum doped with the laser dye 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyril)-4H-pyrane, which is fabricated by a rotating shadow mask evaporation. This allows for a simple, broadband continuous tuning of the laser emission wavelength.

47 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20233
20229
20211
20201
20187
201789