Physics of Semiconductor Lasers 1991
DOI: 10.1016/b978-0-444-98737-2.50003-4
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Cited by 25 publications
(49 citation statements)
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“…7. The measured wavelength separation between neighbouring peaks is around 8 nm that well agrees with the separation of the allowed modes assuming the epitaxial thickness as the cavity length (∆λ = λ 2 /2n eff L: n eff effective refractive index, L cavity length) [7]. The thermal resistance of the vertical LED is measured to be 48 K/W and far smaller than 240 K/W of the conventional p-side up LED on sapphire.…”
Section: Device Characteristicsmentioning
confidence: 74%
“…7. The measured wavelength separation between neighbouring peaks is around 8 nm that well agrees with the separation of the allowed modes assuming the epitaxial thickness as the cavity length (∆λ = λ 2 /2n eff L: n eff effective refractive index, L cavity length) [7]. The thermal resistance of the vertical LED is measured to be 48 K/W and far smaller than 240 K/W of the conventional p-side up LED on sapphire.…”
Section: Device Characteristicsmentioning
confidence: 74%
“…There are a number of factors which affect the threshold in optical pumped laser structures. The higher threshold of laser 2 can be explained by a smaller confinement factor defined as the overlap of the optical mode with the active region [9]. In addition, the smaller contrast of the refractive indices between the waveguide (6% instead of 4% of aluminum) and cladding layer (12%) increases the threshold.…”
Section: Resultsmentioning
confidence: 99%
“…The threshold of laser operation is obtained if the gain in the resonator compensates for the overall losses, i.e., the propagation losses and the apparent losses due to the extraction of light [1][2][3][4]. Figure 1.1 shows the energy band structure with nearly free carrier approximation [2].…”
Section: Energy Band Theorymentioning
confidence: 99%
“…Only if the optical gain is greater than the threshold gain g th , the laser operation can be established. The threshold gain g th is calculated and expressed as [2,3] …”
Section: Principle Of Semiconductor Lasersmentioning
confidence: 99%