Design consideration and performance of high-power and high-brightness InGaAs-InGaAsP-AlGaAs quantum-well diode lasers (/spl lambda/=0.98 /spl mu/m)

A theoretical optimization of GaInP/GaInAs/GaAs based 980 nm Al-free pump laser using self-consistent numerical simulation

“…A wavelength shift and 360 K has been obtained for GaAsDnGaAs and InGaAsPDnGaAs device, respectively and comparable to the experimental data [1-4]. For instance, a characteristic temperature of 180 K (for 20 -120 OC), 305 K (for 20 -60 OC) [l] and 250 K (for 25-65 OC)[4] at 0.98 pm AI-free devices has been achieved. A large conduction band offset and hence better carrier Confinement of InGaAsPhGaAs material has resulted in a high value of characteristic temperature.…”

Engineering transverse Bragg resonance waveguides for large modal volume lasers

“…For D´ 0.072 in Table 1 (corresponding to an index contrast of Dn 0.02), the effective modal width approaches 93 mm, which is ϳ20 times larger than that of the state-of-the art single-ridge waveguide high-power semiconductor laser. 5 For applications such as high-power lasers it is possible to use W co larger than W co sig and still maintain single-transverse-mode operation. The key reason is that multiple transverse modes have significantly different propagation loss, a unique feature to the TBR waveguide.…”

“…We show that the unique properties of Bragg confinement make it possible through modal loss discrimination to achieve single-transverse-mode operation with transverse modal size that is an order of magnitude larger than in lasers that depend on total internal ref lection A unique feature of the TBR structures is the large modal cross section, which makes them particularly attractive for applications such as high-power delivery and high-power lasers, for which the maximal power is limited by the transverse modal size and the power density at catastrophic optical mirror damage of the end facets. 4,5 In conventional waveguides based on total internal ref lection, to achieve good beam quality (single-lateral-mode operation) the core width is typically limited to several micrometers, such as in the well-known ridge waveguide laser. …”

“…2,3 A unique feature of the TBR structures is the large modal cross section, which makes them particularly attractive for applications such as high-power delivery and high-power lasers, for which the maximal power is limited by the transverse modal size and the power density at catastrophic optical mirror damage of the end facets. 4,5 In conventional waveguides based on total internal ref lection, to achieve good beam quality (single-lateral-mode operation) the core width is typically limited to several micrometers, such as in the well-known ridge waveguide laser. 5 In this Letter we investigate the condition of single-transverse-mode guiding in a TBR waveguide with a much larger core width and demonstrate that the TBR waveguide can possess a much larger core width and thus can have a significant advantage over the traditional total internal ref lection waveguides for high-power laser applications.…”

“…4,5 In conventional waveguides based on total internal ref lection, to achieve good beam quality (single-lateral-mode operation) the core width is typically limited to several micrometers, such as in the well-known ridge waveguide laser. 5 In this Letter we investigate the condition of single-transverse-mode guiding in a TBR waveguide with a much larger core width and demonstrate that the TBR waveguide can possess a much larger core width and thus can have a significant advantage over the traditional total internal ref lection waveguides for high-power laser applications. Futhermore, the basic idea proposed here can be used to increase the core widths of other types of photonic crystal waveguides.…”