Experimental evaluation of novel, tunable MMI-MZI demultiplexer in InP

Larsen, Claus Popp; Larsson, S.N.; Almström, Erland; Carlden, H.; Stoltz, B.; Öberg, Olof; Falk, Joel

doi:10.1109/ecoc.1998.732464

Cited by 5 publications

(5 citation statements)

References 3 publications

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“…Multimode interference (MMI) device is widely used in integrated optics such as power splitter [1][2][3][4], optical switch [5], WDM [6][7][8][9], etc. The main part of MMI device is wide, multimode waveguide and the access waveguide can be single mode.…”

Section: Introductionmentioning

confidence: 99%

Semiconductor Laser Using Multimode Interference (MMI) Principle

Yin

Teng

Lin

et al. 2008

2008 IEEE PhotonicsGlobal@Singapore

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Multimode interference (MMI) structure is introduced in semiconductor laser to realize higher power and shorter device length. We use BPM simulation in the device design. MMI-LD was fabricated and realized in InGaAsP/InP based material and output power of up to 2.296mW was achieved. The implemented MMI-LD exhibits stable singlemode output operating at a wavelength of 1.52µm at 10°C. As a comparison, conventional semiconductor laser using straight waveguide is also fabricated in the same wafer and the output power is 0.534mW. MMI-LD also shows better temperature tolerance due to the MMI wavelength selecting function.

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Section: Introductionmentioning

confidence: 99%

Semiconductor Laser Using Multimode Interference (MMI) Principle

Yin

Teng

Lin

et al. 2008

2008 IEEE PhotonicsGlobal@Singapore

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“…MMI devices that are used as wavelength splitters are usually integrated with other components for instance, the Mach-Zehnder Interferometer (MZI) [64][65][66][67][68]. Standalone MMI optical filters with rib [69], ridge [70] and deeplyetched rib [71] waveguide have also been simulated.…”

Section: Multimode Interference Devices (Mmi)mentioning

confidence: 99%

“…The MMI device can also be used as a wavelength filter. Wavelength or optical filters [75][76][77] These include (1) Mach-Zehnder interferometers (with unbalanced arms) [64][65][66][67][68], (2) directional couplers [78][79][80][81], (3) vertical couplers [78,79] and gratingassisted couplers [82][83][84][85], (4) asymmetric Y branches [86], (5) MMI [69][70][71], (6) ring resonators [87,88], (7) arrayed waveguide gratings (AWG) [89][90][91][92][93][94] and (8) Echelles gratings [95][96][97][98][99][100][101][102]. (1) to (6) are devices for filtering single wavelengths and many devices can be cascaded to filter or demultiplex multiple wavelengths.…”

Section: Multimode Interference Devices (Mmi)mentioning

confidence: 99%

“…Since III-V materials and its related fabrication techniques are more costly in general, polymers [106] and sol-gel materials [107] MMI devices are often used in integrated photonic circuits because its size makes it an easy component to be fabricated, and it allows input light to be split in whatsoever way is required. Examples of such applications include the ring lasers [108], polarization-insensitive MZI switches [64][65][66][67][68], MZI polarization splitter [109], and optical hybrids for phase diversity networks and polarization diversity receivers [46]. Active passive integration has long been a challenge or "bottleneck" for PIC.…”

Section: Design Variations For MMI Devicesmentioning

confidence: 99%

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Multimode interference devices and integration with electroabsorption modulators for photonic integrated circuits

Lee¹

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This thesis would not have been realized without the assistance of many parties. I would like to thank my first advisor, the late Prof. Chin Mee Koy for making everything possible in the first place by accepting me as his student. Throughout my first five years, under his kind tutelage and advice, the project had taken form and blossomed to what it is today. I am also very grateful to Dr. Mei Ting for taking me under his wings for the remainder of my PhD and under his guidance, this dissertation is finally completed. I am also eternally grateful for the great team of researchers I have been working with, namely, Lee Chee Wei, my 'senior' by half a year, whose patience and calm outlook has a force of its own to temper down my often more rash and impulsive actions; Stevanus Darmawan, whose inquisitive nature had influenced me greatly to be more adventurous in my research. His attention to details and perseverance in investigating his projects has taught me to take pride in fine-tuning things, be it in research or in perfecting a figure. Landobasa Y.M.A.T., an enigma when it comes to his high grasp of all things mathematical and theoretical, has also greatly motivated me to overcome my fears of equations. His infinite streams of ideas are often the tide that has saved me, be it in getting unstuck from a dead end or infusing new angle of approach and research. Research fellows Dr. Xu Chendong and Dr.Yang Hua are the lifelines that I have often cling to in matters regarding fabrication. Their vast amount of practical experience has also helped reveal to me the solutions to many a problem. Although my years in NTU had been peppered with ephemeral acquaintances, the short time with them had also been wonderful, our brief conversations and co-operations often stirring the calm waters and bringing in a breath of fresh air at 'old' things. These wonderful people are Mohd. Hanif Ibrahim of USM (Malaysia), Dr Zhang Xiao of SimTech and Li Yicen and Zhao Qiu Ji of NTU, among many others. Thank you.

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“…MMI devices are often used in integrated photonic circuits because its size makes it an easy component to be fabricated, and it allows input light to be split in whatsoever way is required. Examples of such applications include the ring lasers [108], polarization-insensitive MZI switches [64][65][66][67][68], MZI polarization splitter [109], and optical hybrids for phase diversity networks and polarization diversity receivers [46].…”

Section: Design Variations For MMI Devicesmentioning

confidence: 99%

Multimode interference devices and integration with electroabsorption modulators for photonic integrated circuits

Lee¹

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Photonic integration is a critical emerging trend in the development of photonic devices. Its significance parallels that of the microelectronic integrated circuits (IC) albeit it has developed slower due to its diversity and often contrasting requirements. Photonic integrated circuits (PIC) is basically made up of small but important building blocks combined to realize even more complex circuits so that it may perform wider range of functionalities on optical signals used in various applications, such as optical communication, instrumentation, sensing, and signal processing. Integration reduces the number of parts and hence the level of packaging and assembly required. It also results in parts with smaller footprints. Integrated components tend to be more reliable and power efficient and hence cut down operating cost. Because of these advantages, photonic integration is considered a key to opening the floodgate of low-cost optical subsystems that will make long-term sustainable investment in optical networks possible. One of the fundamental issues of PIC is the interconnection from one active device to another. This is generally done using waveguides. Waveguides are also used to split or combine light. With the introduction of multimode interference (MMI) couplers, the splitting and coupling of light in integrated optics has become much more compact. The MMI device also has the advantage of being robust and polarization insensitive therefore making it one of the most elegant and versatile passive devices in photonic circuits. In this thesis, we introduce and develop many functional circuits based on MMI couplers. Although the MMI device can be integrated with many other devices which are either passive or active, the MMI device on its own is also a versatile building block that can perform many functions, such as switching, multiplexing, and polarization splitting. I have studied the fundamentals of MMI and linked its modal properties to those of directional couplers, and established the transformation relationship between them. Traditionally, 1:N MMI splitters have been accomplished with rib-waveguides. Our approach of using highly guiding ridge waveguides however, helps constrain the size and subsequently, the loss of our 1:N devices. We have demonstrated 1:N splitters for N up to 8 and achieved a 1:2 MMI splitter with ±5% uniformity for up to 35nm wavelength bandwidth based on the InP platform.

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Experimental evaluation of novel, tunable MMI-MZI demultiplexer in InP

Abstract: A novel recon,figurahle h P wavelength demultiplexer is reported. WDM experiments have been perforined on a packaged device demonstrating tunabil'ity across the EDFA window. 4000 knz in a recirculating loop was achieved at 2.5 Gbit/s.

Cited by 5 publications

References 3 publications

Semiconductor Laser Using Multimode Interference (MMI) Principle

Semiconductor Laser Using Multimode Interference (MMI) Principle

Multimode interference devices and integration with electroabsorption modulators for photonic integrated circuits

Multimode interference devices and integration with electroabsorption modulators for photonic integrated circuits

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