Distributed feedback lasers with multiple phase-shift regions

Agrawal, Govind P.; Geusic, J. E.; Anthony, P. J.

doi:10.1063/1.100166

Cited by 55 publications

(24 citation statements)

References 8 publications

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“…Their recent work on LSHB suppression by introducing a pair of phase shifts in the basic sampled grating DFB structure [9] has shed light on solving the aforementioned issue through a viable approach. Comparing with the existing methods [10], not only this approach appears to be more effective, but it also bears the unique feature of fabrication readiness and easiness. This work is also comprehensively and coherently presented with the design concept and working principle clearly explained, and with the simulation and experimental results shown consistently.…”

mentioning

confidence: 89%

Longitudinal spatial hole burning, its impact on laser operation, and suppression

2015

Science Bulletin

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mentioning

confidence: 89%

Longitudinal spatial hole burning, its impact on laser operation, and suppression

2015

Science Bulletin

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“…However, for DFB lasers the phase shift layers are placed far apart in order to distribute the optical field throughout the laser structure and reduce the spatial hole burning [53,55], while in these microcavities the phase shift layers are acting to concentrate the optical field.…”

Section: Phase-shift Cavitymentioning

confidence: 99%

“…From distributed feedback (DFB) laser theory it is known that this is not the only way to induce Fabry-Perot modes [53]. An alternative approach to achieve the same effect is to place two λ/8 low index phase-shift layers around a λ/4 high refractive index layer containing the active region, thereby forming a virtual λ/2 cavity [44].…”

Section: Phase-shift Cavitymentioning

confidence: 99%

High efficiency planar MCLEDs

Joray¹,

Stanley²,

Ilegems³

2005

Physica Status Solidi (b)

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The physics of microcavities have been a subject of intense study over the past 25 years. This work stimulated a large body of experimental and theoretical work on the optimization of the light extraction properties of light‐emitting diodes. Not only has this led to the current high efficiency microcavity LEDs but also to the high brightness LEDs based on other approaches, which are presently available on the market. An overview of the state of the art of planar semiconductor microcavity LEDs will be presented. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Single longitudinal mode (SLM) operation is often restricted to the vicinity of threshold [8]. Therefore, some methods were proposed to reduce the SHB, such as multiple phase shifts structure [12,13] and corrugation-pitch modulation (CPM) structure [14,15]. But the fabrication of these complex structures requires a precision control of each grating line.…”

mentioning

confidence: 99%

Numerical study of three phase shifts and dual corrugation pitch modulated (CPM) DFB semiconductor lasers based on reconstruction equivalent chirp technology

Shi

et al. 2010

Chin. Sci. Bull.

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A distributed feedback (DFB) semiconductor laser with three phase shifts based on reconstruction equivalent chirp (REC) technology is proposed and investigated numerically. With the combination of multiple phase shifts and corrugation pitch modulated (CPM) structure, we also propose a novel and more complex structure named dual CPM, which has a flatter light power distribution along the laser cavity compared with the true double phase shifts DFB laser diode (LD), while the P-I curves are nearly the same. The proposed dual CPM structure is also designed and analyzed based on REC technology. The simulation results show that, the DFB semiconductor laser with complex structure such as phase shifts, or even arbitrary variation of the grating period can be achieved equivalently and easily by changing the sampling structure. But its external characteristics are almost the same as those DFB lasers with true phase shifts, or true arbitrary variation of the grating period. The key advantage of the REC technology is that it varies only the sampling structure and keeps the seed grating (actual grating in sampling structure) period constant. So its fabrication needs only low-cost and standard holographic exposure technology. Therefore we believe this method can achieve the high-end and low-cost DFB LD for mass production. semiconductor laser, distributed feedback (DFB), multiple phase shifts, corrugation pitch modulated (CPM), reconstruction equivalent chirp (REC) Citation: Shi Y C, Tu X H, Li S M, et al. Numerical study of three phase shifts and dual corrugation pitch modulated (CPM) DFB semiconductor lasers based on reconstruction equivalent chirp technology.

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Distributed feedback lasers with multiple phase-shift regions

Cited by 55 publications

References 8 publications

Longitudinal spatial hole burning, its impact on laser operation, and suppression

Longitudinal spatial hole burning, its impact on laser operation, and suppression

High efficiency planar MCLEDs

Numerical study of three phase shifts and dual corrugation pitch modulated (CPM) DFB semiconductor lasers based on reconstruction equivalent chirp technology

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