1 / 10

Development of optopackage at NIKHEF

Development of optopackage at NIKHEF. Optical links session SCT week, 3 June 99. Fred Hartjes Contents Geometry Efficiency VCSEL to fibre coupling Pin diode Conclusions. Introduction. Intended as a simple solution for the forward system test Based on packaged elements.

armando-carver
Download Presentation

Development of optopackage at NIKHEF

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Development of optopackage at NIKHEF Optical links session SCT week, 3 June 99 Fred Hartjes Contents Geometry Efficiency VCSEL to fibre coupling Pin diode Conclusions

  2. Introduction • Intended as a simple solution for the forward system test • Based on packaged elements VCSEL in ‘miniature pill’ (SV 2637-001) Pin diode HFD 3013 in TO46 (TO46 still too big)

  3. Geometry considerations • Less mechanical protection required by using packaged elements • Fibres hold by crimped capillary pipe (Ø 0.5 mm). • Capillaries hold by polyester block (Arnite). • Electrical connection VCSEL’s and PIN diode by conductive glue • Alignment of VCSEL’s by adjusting VCSEL position while glue has not yet cured • => Rapid and non-critical assembly procedure expected for most steps • For forward system test: stripped PIN diode from TO 46 housing

  4. Assembly opto plugin

  5. VCSEL to fibre coupling • sufficient for commercial receivers at forward system test (range 5 - 100 µW) • NOT sufficient for planned off detector opto receiver • Coupling efficiency 8.5%

  6. Lumunous power (P vs vertical fibre position (Y) for partially removed VCSEL lens 300 fibre 250 Y no lens cut m 170 m m 460 m 200 m 690 m W) m m 690 m (d = 30 m) m P ( Emitter: SV 2637-001 Fibre: Newport 50/125/250 150 Detector: Radiantech FMT 220 ST Emitter current: 10.0 mA m => est. lum. power: 970 W 19-5-99 100 50 0 -50 0 50 100 150 m Y ( m), arbitrary origin Improvement by cutting VCSEL lens Efficiency up to 30% VCSEL

  7. More improvement using focussing lens Efficiency over 40%

  8. Power vs. focussing • 2 magnifications • 1 • 0.64

  9. Pin diode • TO46 case too big • using stripped diode: die + focussing sphere • die 620 x 660 µm • sphere Ø 570 µm

  10. Conclusions/ remarks • Design probably feasible for forward system test • For final SCT design • optical power small (300 uW using removed VCSEL lens • better with additional focussing lens ( > 400 µW from 1 mW optical power) • Drawbacks of focussing lens • more length of opto package • also alignment in Z critical • 3013 pin diode may be produced as a special in miniature pill or comparable housing for big quantities

More Related