Method of fixing an optical fibre in a laser package

Shaw, Matthew; Galeotti, Roberto; Coppo, G.

doi:10.1109/ectc.2001.928025

Cited by 9 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FEA simulations have shown that it is advantageous, in order to keep the stress on the fibre as low as possible, to keep the inner diameter of the bore where the fibre is fixed as small as possible. This reduces the stress on the fibre both when it is in the centre of the bore or offset from the centre of the bore 27,28 . A counter bore where the fibre exits the tube is used to reduce the stress at this point.…”

Section: Fibre Assemblymentioning

confidence: 97%

See 1 more Smart Citation

Use of glass solder in fixing an optical fiber in a laser package

Galeotti¹,

Shaw²,

Musio³

et al. 2002

SPIE Proceedings

View full text Add to dashboard Cite

In order to couple the light emitted from a semiconductor laser into the core of an optical fibre, where the core and laser emitting are not matched, it is necessary to use a lens system. This lens system then focuses the divergent light into the fibre core, often this lens is fabricated on the end of the fibre. When the lens is on the end of the fibre, it must be fixed in place in front of the emitting laser using a method that will hold the fibre in position relative to the laser during the lifetime of the laser. This reliability requirement is particularly critical in the case of lasers with a highly elliptical output beams. The tolerances for the displacement of the lensed fibre relative to the laser are extremely tight, a movement of less than 0.5 microns in the vertical direction can cause a drop in coupled power of greater than 10%. In this paper existing techniques of fixing the fibre relative to the laser are outlined and contrasted with an improved method using glass solder. The improved method is described with salient features such as the fixing of the fibre to a rigid support member and the laser welding process used to fix the rigid support member in front of the laser explained in detail. Other aspects of the laser design including thermal dissipation are also discussed in detail. Finite element analysis (FEA) has used extensively to demonstrate the capacity of the design. Device performance and reliability information is also presented demonstrating the capability of this technique in the fixing of an optical fibre relative to a laser device.

show abstract

Section: Fibre Assemblymentioning

confidence: 97%

“…SEM photographs (Fig. 6) of the fibre assembly after temperature cycling clearly showing the delaminated metal 27,28 . The stress placed on the fibre with Au/Sn solder has also been highlighted.…”

Section: Fibre Assemblymentioning

confidence: 98%

Use of glass solder in fixing an optical fiber in a laser package

Galeotti¹,

Shaw²,

Musio³

et al. 2002

SPIE Proceedings

View full text Add to dashboard Cite

show abstract

“…For practical reason, a glass tube with 0.30mm inner diameter is chosen. The sealing hole sizes and fiber offset all affect the sealing quality [2].…”

Section: Sealing Design and Experimental Setupmentioning

confidence: 99%

“…The light-coupling between the core and the cladding modes is depicted in Figure 1 (2) and the long-period grating wavelength:…”

Section: Long-period Fiber Grating Preparationmentioning

confidence: 99%

Hermetic sealing of long period fiber gratings

Yang¹,

Guo

Kim

2006

Proceedings of SPIE

View full text Add to dashboard Cite

show abstract

“…2 depicts a typical butterfly laser package [5], [6], composed of a single-mode fiber, a thermoelectric cooler (TEC), an optical subassembly-which is the platform onto which the laser diode and some of the other components are mounted-and the clip, which provides the welding interface between the fiber ferrule and the weld platform on the optical subassembly [7]. The tip of the fiber is encapsulated in a cylindrical metallic fiber ferrule.…”

Section: A Package Constructionmentioning

confidence: 99%

A novel inspection of fiber post-weld-shift in butterfly laser module packaging

Tseng

Sung

2005

IEEE Trans. Adv. Packag.

View full text Add to dashboard Cite

Butterfly packaging technology with a fiber pigtail is widely used in packaging optical modules, and laser welding is used to join components in a butterfly package. During laser welding, the rapid solidification of the welded region and the associated shrinkage of material are expected cause relative movement between prealigned components. Such a post-weld-shift (PWS) might significantly reduce the efficiency of light coupling. The laser hammer technique can be used to realign fiber that shifts during laser welding, and it requires that the fiber shift be measured in three directions. Measuring the shift along the axis is difficult because space is limited. In this paper, a reflector placed near the fiber during laser welding was used to determine the shift along the -axis. The fiber images obtained using the charge-coupled device (CCD) camera were sometimes deformed, so digital image processing was used to calibrate the deformed images and calculate the fiber shift along three axes. The experimental results indicate that the fiber shift along the -axis, when captured using reflector inspection could be measured precisely, and more strongly influenced power coupling loss than shifts in the other two directions. The results are useful in implementing the realignment method after butterfly packaging.Index Terms-Butterfly package, fiber alignment shift, mirror inspection, post-weld-shift (PWS).

show abstract

Method of fixing an optical fibre in a laser package

Cited by 9 publications

References 17 publications

Use of glass solder in fixing an optical fiber in a laser package

Use of glass solder in fixing an optical fiber in a laser package

Hermetic sealing of long period fiber gratings

A novel inspection of fiber post-weld-shift in butterfly laser module packaging

Contact Info

Product

Resources

About