Automated mass production line for optical module using passive alignment technique

Yamauchi, K.; Kurata, K.; Kurihara, Minoru; Sano, Yoshiki; Sato, Yoshiro

doi:10.1109/ectc.2000.853109

Cited by 11 publications

(3 citation statements)

References 3 publications

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“…Most of them make use of the mechanical and chemical properties of silicon using well known MEMS technologies like wet KOH etching and DRIE plasma etching to allow fiber being guided into grooves in front of active dies like photodiodes, laser diodes or waveguides. These works have been reported in many publications and books [1][2][3][4].…”

Section: Introductionmentioning

confidence: 87%

Dry-film technology as a standard process for passive optical alignment of Silicon Photonics Devices

Kopp

Bernabé

Philippe

2009

2009 59th Electronic Components and Technology Conference

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Packaging of optolelectronic devices has always been a bottleneck for mass production. Today, it is still the case for Silicon Photonics Devices. Intrinsically, the technology of silicon nanowires integrated onto SOI electronic integrated circuits allows the same kind of cost reduction as the one encountered in the microelectronic industry. However, smart solutions have to be proposed in order not to lose this benefit because of the use of non suitable packaging architectures.In this paper, we present a low-cost, mass production compatible and easy-to-transfer technique that allows optical fibers to be passively aligned in front of silicon photonics devices' optical I/Os. This technique is based on the use of dry-film structures that enable optical fibers to be positioned with accuracy below 5 µm. Combined with optical input like photodiodes or with I/Os made of vertical grating coupler, this approach is a promising one for achieving future low cost integrated optical devices.Moreover, the concept could be extended to multichannel devices used for Parallel Optics links.

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Section: Introductionmentioning

confidence: 87%

Dry-film technology as a standard process for passive optical alignment of Silicon Photonics Devices

Kopp

Bernabé

Philippe

2009

2009 59th Electronic Components and Technology Conference

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“…Most of the existing photonic automation systems couple laser diodes to fiber, fiber to fiber, or waveguide (on an integrated circuit) to a fiber 30 . The state-of-the-art technology is based on the mature industrial and semiconductor automation, robotics, motion control, sensors technology, and capital equipment.…”

Section: Background: Photonic Automationmentioning

confidence: 99%

Knowledge-based design of optoelectronic packaging and assembly automation

2003

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In this paper, we present an automation technique that yields high performance, low cost optoelectronic alignment and packaging through the use of intelligent control theory and system-level modeling. Our control loop design is based on model predictive control, previously popularized in process and other control industries. Our approach is to build an a priori knowledge model, specific to the assembled package's optical power propagation characteristics, and use this to set the initial "feed-forward" conditions of the automation system. In addition to this feed-forward model, our controller is designed with feedback components, along with the inclusion of a built in optical power sensor. The optical modeling is performed with the rigorous scalar Rayleigh-Sommerfeld formulation, efficiently solved using an angular spectrum technique. One of the benefits of using our knowledge based control technique is that the efficiency of the automation process can be increased, as the number of alignment steps can be greatly reduced. An additional benefit of our technique is that it can reduce the possibility that attachment between optical components will occur at local power maximums, instead of the global maximum of the power distribution. Therefore, our technique improves system performance, while reducing the overall cost of the automation process.

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“…V-groove on silicon substrate is utilized for passive alignment and the fiber is aligned on the V-grooves passively [7][8]. Figure 1 shows a typical V-groove assembly.…”

Section: Introductionmentioning

confidence: 99%

Effect of V-groove Side Wall Feature on Epoxy Flow in Passive Alignment of Optical Fiber

Lam

Lee

2007

Polytronic 2007 - 6th International Conference on Polymers and Adhesives in Microelectronics and Photonics

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The alignment issue with optical fibers is very important in optoelectronics packaging. A slight offset in any direction could severely affect the optical performance of photonic devices. Nowadays passive alignment of optical fiber has become popular due to its low cost and short processing time. The self-alignment property is another advantage of passive alignment.A recent study states that the dispensing volume and the viscosity are the main factors affecting the yield of passive alignment. On the other hand, the surface feature of the V-groove side wall is another significant factor affecting the fiber alignment. In order to get an optimum surface condition for the V-groove, alignment of the mask pattern to the [1 1 0] direction is very important. Slight misalignment between the mask and crystal direction will change the surface profile of the wall, as well as the dimension of the V-groove, and hence affect the alignment of the fiber.In this paper, the effect of mask misalignment and the side wall feature on fiber alignment is studied. V-grooves with no rotation, rotated 1 o , 2 o and 3 o are fabricated by anisotropic etching. Surface profiles are characterized by using an optical profiler. It can be shown that angular misalignment between the pattern and the crystal direction will result in a poor surface profile. An epoxy flow study is carried out to measure the effect of the side wall feature. Experimental results show poor surface profile will reduce the yield of optical fiber passive alignment. The result is useful in optimizing the V-groove fabrication process and the epoxy flow in the passive alignment of optical fiber.

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Automated mass production line for optical module using passive alignment technique

Cited by 11 publications

References 3 publications

Dry-film technology as a standard process for passive optical alignment of Silicon Photonics Devices

Dry-film technology as a standard process for passive optical alignment of Silicon Photonics Devices

Knowledge-based design of optoelectronic packaging and assembly automation

Effect of V-groove Side Wall Feature on Epoxy Flow in Passive Alignment of Optical Fiber

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