Loss reduction for phased-array demultiplexers using a double etch technique

Dam, C. van; Staring, Aam Toine; Jansen, EJ Eline; Binsma, Jjm Hans; Dongen, T. van; Smit, MK Meint; Verbeek, B.H.

doi:10.1364/ipr.1996.imc6

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…A disadvantage of the latter approach is that lowering the confinement increases the minimal bending radius and, consequently, increases the device size. Low confinement can be combined with small bending radii by applying a local contrast reduction near the array apertures using a double-etch process [23].…”

Section: E Design For Low Lossmentioning

confidence: 99%

PHASAR-based WDM-devices: Principles, design and applications

Smit

Dam

1996

IEEE J. Select. Topics Quantum Electron.

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Section: E Design For Low Lossmentioning

confidence: 99%

PHASAR-based WDM-devices: Principles, design and applications

Smit

Dam

1996

IEEE J. Select. Topics Quantum Electron.

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784

335

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“…Without considering the absorption loss of the material, there is a large mode mismatch between the deeply etched waveguide and the slab region, resulting in a large coupling loss. Therefore, a section of shallow etched transition waveguide is introduced at the junction of the deeply etched waveguide and the slab region to reduce the mode mismatch, that is double-etched process [9], [21]. Meanwhile, a linear taper is used to further reduce the coupling loss, as depicted in the Fig.…”

Section: Design and Fabricationmentioning

confidence: 99%

Monolithically Integrated 8 × 8 Transmitter-Router Based on Tunable V-Cavity Laser Array and Cyclic Arrayed Waveguide Grating Router

et al. 2022

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A monolithic 8×8 transmitter-router chip fabricated on InGaAlAs-InP multi-quantum well wafer for distributed wavelength routing network in the O-band with a channel spacing of 400 GHz is experimentally demonstrated. A tunable V-cavity laser (VCL) array, a cyclic-arrayed waveguide grating router (AWGR) and a semiconductor amplifier (SOA) array are integrated using the quantum-well intermixing (QWI) technique for its fabrication simplicity and cost effectiveness. A 200 GHz-spaced compact-size VCL is demonstrated with a 27 nm tuning range and a side-mode suppression ratio (SMSR) around 40 dB using a single-electrode controlled tuning. The chip output power is 24.6 mw. Measurement results of the transmitter-router chip show that all 64 input-output combinations have cyclic response spectra. After passing through the SOA with 80 mA bias current, an output power of about 9.6 mW and optical signal-to-noise ratio (OSNR) up to 39 dB have been measured. The demonstrated transmitter-router chip is fabricated on the same quantum well structure without requiring multiple epitaxial growth and complex grating fabrication. The characteristics of multi-wavelength and multi-port transmissions enable the distributed optical routing networks with flexible bandwidth allocation, which can find wide application in datacenters and high-performance computers.

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“…Therefore the excess loss is high by increasing the branch number. To solve this problem, the double etch technique and the vertically tapered waveguide using additional processing steps have been reported [2,3]. On the other hand, a method using intersectional paths at the Y-branch circuit has also been reported [4].…”

Section: -2 1x64splittermentioning

confidence: 99%

High Channel Low Loss Optical Splitter using Silica-based PLC on Quartz Substrate

Toshiaki

Hasegawa

Nara

2008

OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference

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We have designed and fabricated the 2x32 optical splitter and the 1x64 optical splitter with the low insertion loss <16.5dB and <19.3dB, respectively for 1.31µm-band and 1.49µm-1.55µm-band by using silica-based PLC on a quartz substrate. IntroductionRecently, the broadband services have spread quickly in Japan. The most spread service is an ADSL (Asymmetric Digital Subscriber Line) at present, however the number of members contracting to a FTTH (Fiber To The Home) using the optical fiber has extended in several years quickly. In all broadband services, the FTTH has the characteristics of the high speed and the most stabilized transmission. In a few yeas ago the charge of the first investment and utilization of the FTTH were high compared with the ADSL, therefore the FTTH was not spread wider. Presently, the charge of the first investment become lower, as a result the spread of the FTTH has started suddenly. The communication carriers have introduced the PON (Passive Optical Network) system in which the group of users shares the same fiber in order to reduce a total cost. In this PON system the optical splitter such as 1xN or 2xN is used to branch one signal to a lot of signals equally.Furthermore in the other country, it is expected that the FTTH has spread and a demand for the optical components using the FTTH has increased. Especially, in Asian countries such as China, the plan of an optical communication network using the 2x32 splitter for the central office side or the 1x64 splitter for the subscriber side is already advanced. In this system, it is strongly required that an optical splitter has the characteristics of a flat wavelength response and a low insertion loss for the wavelength range of 1.31µm-band (1.26µm -1.36µm) and 1.49µm-1.55µm-band (1.48µm -1.625µm).In this paper, we report the fabricated results of a 2x32 splitter and a 1x64 splitter which are a flat wavelength response and a low insertion loss by using silica-based PLC (Planer Lightwave Circuit) on a quartz glass substrate.

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Loss reduction for phased-array demultiplexers using a double etch technique

Cited by 11 publications

References 5 publications

PHASAR-based WDM-devices: Principles, design and applications

PHASAR-based WDM-devices: Principles, design and applications

Monolithically Integrated 8 × 8 Transmitter-Router Based on Tunable V-Cavity Laser Array and Cyclic Arrayed Waveguide Grating Router

High Channel Low Loss Optical Splitter using Silica-based PLC on Quartz Substrate

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