Multiwavelength DFB laser arrays with integrated combiner and optical amplifier for WDM optical networks

Zah, Chung−En; Amersfoort, M.R.; Pathak, B.; Favire, F.; Lin, Ping; Andreadakis, N.C.; Rajhel, A.; Bhat, R.; Caneau, C.; Koza, M.A.; Gamelin, J.

doi:10.1109/2944.605710

Cited by 33 publications

(6 citation statements)

References 31 publications

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“…With the BIG scheme, an up to 99% coupling efficiency between the passive and active waveguides can be expected [15]. Unlike the offset waveguide structure [7], the decrease of optical confinement of the active MQW layer resulting from the integration of the passive layer is negligibly small. It is obvious that the SAG process is inherently compatible with the BIG process.…”

Section: Methodsmentioning

confidence: 98%

“…When compared with multiple discrete DFB lasers, laser arrays have many advantages such as lower packaging cost, lower power consumption, and compact size [7]- [9]. However, it is not easy to fabricate high-performance multi-wavelength laser arrays.…”

Section: Introductionmentioning

confidence: 99%

“…First, different laser emissions, which are uniformly spaced, have to be defined side by side on the wafer. Electron beam lithography (EBL) is usually used to obtain different emission wavelengths, which is, however, an expensive and time-consuming technique [7]. Other techniques such as multi-quantum well (MQW) selective area growth (SAG) and ridge width variation were also used.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Low-Cost Multiwavelength Laser Arrays for OLTs in WDM-PONs by Combining the SAG and BIG Techniques

et al. 2015

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We present the fabrication of a low-cost multiwavelength laser array monolithically integrated with a passive optical combiner for optical line terminals (OLTs) in wavelength-division multiplexing (WDM) passive optical networks (PONs). By combining the upper separate confinement heterostructure layer selective area growth technique and the bundle integrated guide technique, both multiwavelength emission with highly uniform spacing and low-loss passive-waveguide material can be obtained in a single metal-organic chemical vapor deposition (MOCVD) growth step, which greatly simplifies the fabrication of the device. A prototype laser array, which has four distributed feedback (DFB) laser elements and a multimode interference coupler as combiner, is successfully fabricated. The shallow ridge structure of the DFB lasers and the deep ridge structure of the passive waveguides are obtained by a single dry etching step, which further eases the device fabrication. The properties of the device are measured and discussed. The results indicate that our method is promising for fabricating cost-effective OLT light sources for WDM-PONs.

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Section: Methodsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of Low-Cost Multiwavelength Laser Arrays for OLTs in WDM-PONs by Combining the SAG and BIG Techniques

et al. 2015

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“…In the past few decades, distributed feedback (DFB) Bragg lasers have been increasingly playing an important role in the fields of optical-fiber communication and sensors, as well as microwave photonics, etc [1][2][3][4]. For conventional DFB lasers, in order to get multiple lasing wavelengths, it is essential to use multiple seed gratings with different grating period.…”

Section: Introductionmentioning

confidence: 99%

A special sampling technology for sampled grating laser

Zhou

Shi

et al. 2010

SPIE Proceedings

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Based on a special sampling technique, we present a special structure for distributed feedback (DFB) lasers. As a conventional equivalent π phase-shift sampling Bragg grating (SBG), this proposed structure also introduces an equivalent π phase-shift into both its ±1 st order channel. Combined with the conventional equivalent π phase-shift, the sampling technique can be used to design and fabricate multiwavelength semiconductor or fiber lasers conveniently.

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“…Over the past decades, many different types of monolithic tunable lasers have been designed and investigated. The grating-based lasers are mostly used, such as distributed feedback (DFB) laser arrays [1], [2]; sampled grating distributed Bragg reflector (SGDBR) laser [3]; digital super-mode (DS) DBR laser [4]. However, the large size and complex fabrication process of grating structures make these lasers expensive.…”

Section: Introductionmentioning

confidence: 99%

Improved Half-Wave Coupled V-Cavity Laser Using Aggregating-Image Multimode Interference Coupler

Chen

Wang

Zhao³

et al. 2022

IEEE Photonics J.

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We theoretically analyze and experimentally demonstrate improved half-wave couplers for widely tunable V-cavity lasers. An overlapping-image 6×6 MMI coupler and an aggregating-image 16×16 MMI coupler are investigated, which give optimal coupling phase and coefficient for achieving high singlemode selectivity in V-cavity lasers while producing a low loss. A single-electrode controlled tuning of 38 channels is achieved with channel spacings of 100GHz and 150GHz. By combining two single-electrode tuning segments at different temperatures, a wavelength tuning range of 52 channels from 1515nm to 1585nm is obtained, and the side mode suppression ratios (SMSRs) reach 45 dB.

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Multiwavelength DFB laser arrays with integrated combiner and optical amplifier for WDM optical networks

Cited by 33 publications

References 31 publications

Fabrication of Low-Cost Multiwavelength Laser Arrays for OLTs in WDM-PONs by Combining the SAG and BIG Techniques

Fabrication of Low-Cost Multiwavelength Laser Arrays for OLTs in WDM-PONs by Combining the SAG and BIG Techniques

A special sampling technology for sampled grating laser

Improved Half-Wave Coupled V-Cavity Laser Using Aggregating-Image Multimode Interference Coupler

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