Dynamics and stability of complex-coupled DFB lasers with absorptive gratings

Zoz, Jürgen; Johannes, T.W.; Rast, A.; Borchert, B.; Barabas, U.; Harth, W.

doi:10.1109/3.400394

Cited by 14 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fortunately, we have found that by adding 1St order DBR reflectors at the ends of a 2' order CC-SE-DFB device it is possible to have a device which exhibits both high flD and high uniformity of the near-field. 6. 1st-ORDER DBR REFLECTORS Now suppose we place 1storder DBR reflectors at each end ofthe device in Fig.4, as shown in Fig.…”

Section: Gain Spatial Hole Burningmentioning

confidence: 99%

Surface-emitting complex-coupled second-order distributed-feedback lasers for high-power applications

1998

View full text Add to dashboard Cite

Theoretical analysis of complex-coupled, surface-emitting distributed feedback (CC-SE-DFB) diode lasers with distributed Bragg reflectors (DBR) is presented. These devices are shown to produce symmetric-mode (single-lobe) surface emission with high efficiency (30%) and uniform near-field in the longitudinal direction. High efficiency and uniform near-field are both necessary for achieving high powers in a single-lobed beam. It is also shown that the device studied here may be combined with a Resonant Optical Waveguide array device which has a uniform near-field in the lateral direction to achieve a twodimensional surface-emitting device capable ofprovidmg greater than 1W CW power in a stable, singlelobed beam.

show abstract

Section: Gain Spatial Hole Burningmentioning

confidence: 99%

Surface-emitting complex-coupled second-order distributed-feedback lasers for high-power applications

1998

View full text Add to dashboard Cite

show abstract

“…Kamp et al proposed the complex-coupled LC-DFB laser by depositing chromium (Cr) gratings on both sides of ridge waveguide [15]. Compared to index coupled LC-DFB lasers, an imaginary part is introduced in the coupling coefficient, which leads to a large loss margin between the main laser mode and side laser mode and ensures very efficient mode discrimination [16]. M Hümmer et al reported complex coupled LC-DFB lasers with Cr gratings emitting at 2.84 μm [17].…”

Section: Introductionmentioning

confidence: 99%

2.7 μm GaSb-based distributed feedback lasers with laterally coupled gratings

Shixian¹,

Yan²,

Cao³

et al. 2022

Phys. Scr.

View full text Add to dashboard Cite

We report on a high-performance GaSb-based quantum well laterally coupled distributed feedback laser emitting at wavelength of 2.7 μm. The first-order grating structure of chromium(Cr) is designed to obtain the maximum coupling coefficient, and is defined alongside the ridge waveguide by electron beam lithography. The DFB laser emits an output power of 4.3 mW in a single-mode operation at a heat-sink temperature of 20 °C. Continuous wavelength tuning has been obtained by varying the injection current with a tuning rate of 0.012 nm/mA. The mixmum side mode suppression ratio is as high as 54.9 dB, which is the highest value ever reported at the wavelength region of 2.7 μm. In addition, the loss margin introduced by Cr gratings is estimated to be 5.02±0.33cm-1.

show abstract

“…[1][2][3][4][5][6] We have previously reported the theoretical analysis of antiphase-type 7,8 ͑i.e., excess gain preferentially placed in the low-index regions͒ second-order, surface-emitting ͑SE͒-CC-DFB lasers. Such devices can be made to fundamentally favor operation in a single-lobed beam that is normal to the surface.…”

mentioning

confidence: 99%

Surface-emitting, distributed-feedback diode lasers with uniform near-field intensity profile

Lopez

Kasraian

Botez

1998

Applied Physics Letters

View full text Add to dashboard Cite

Theoretical analysis of second-order surface-emitting, complex-coupled distributed feedback diode lasers with first-order distributed Bragg reflectors ͑DBR͒ is presented. The DBR reflectors are shown to insure simultaneous operation in a virtually uniform near-field profile with high efficiency and adequate intermodal discrimination. Such devices display symmetric-mode ͑single-lobe͒ surface emission with relatively high external differential quantum efficiency ͑30%͒, low gain threshold ͑18 cm Ϫ1 ), and Ͻ8% near-field intensity profile variations ͑in the longitudinal direction͒. The devices have the potential to provide Ͼ100 mW of stable, single-mode cw power, significantly higher than it is possible with vertical-cavity surface-emitting lasers. It is also shown that the device studied here can be combined with a resonant optical waveguide array device to produce a 2D uniform near-field surface-emitting source capable of providing greater than 1 W cw power in a stable, single-lobed beam. © 1998 American Institute of Physics. ͓S0003-6951͑98͒01542-3͔Complex-coupled, distributed-feedback ͑CC-DFB͒ edgeemitting lasers have recently received considerable theoretical and experimental attention as potential light sources in advanced optical-communication systems. [1][2][3][4][5][6] We have previously reported the theoretical analysis of antiphase-type 7,8 ͑i.e., excess gain preferentially placed in the low-index regions͒ second-order, surface-emitting ͑SE͒-CC-DFB lasers. Such devices can be made to fundamentally favor operation in a single-lobed beam that is normal to the surface. Although ridge-guided devices of this type should be capable of providing 50-100 mW cw power, they are unsuitable for high power single-mode applications, since they have highly nonuniform near-field intensity profiles 7 which make them susceptible to multimode operation due to longitudinal gain spatial hole burning ͑GSHB͒ at high drive levels above threshold. Here we show that by integrating first-order distributed Bragg reflectors ͑DBR͒ at the ends of the SE-CC-DFB structure, surface-emitting devices can be made to lase with both high external differential quantum efficiencies, D , as well as highly uniform near-field intensity profiles.That is, a design is presented for high-power (Ͼ100 mW͒ stable, single-mode operation from surface-emitting diode lasers. Figure 1 schematically depicts a second-order SE-CC-DFB with first-order DBRs. Surface emission occurs only in the second-order region, while the first-order DBRs serve as terminations for the SE-CC-DFB. We show that such devices can lase in a single-lobed beam pattern with gain thresholds of ϳ18 cm Ϫ1 and an D value of 30%, while maintaining a virtually uniform near-field profile. Furthermore, it can be inferred that by combining this surface-emitting device with a resonant optical waveguide ͑ROW͒ array one can create a two-dimensional surface-emitting laser capable of providing greater than 1 W cw single-mode power in a stable, singlelobed beam.The longitudinal cross section of the device...

show abstract

Dynamics and stability of complex-coupled DFB lasers with absorptive gratings

Cited by 14 publications

References 15 publications

Surface-emitting complex-coupled second-order distributed-feedback lasers for high-power applications

Surface-emitting complex-coupled second-order distributed-feedback lasers for high-power applications

2.7 μm GaSb-based distributed feedback lasers with laterally coupled gratings

Surface-emitting, distributed-feedback diode lasers with uniform near-field intensity profile

Contact Info

Product

Resources

About