Alpes Lasers . TC-3 Datasheet download pdf (Page 10)

Applications: telecom

• Telecommunications

– Free-space optical data transmission for the last mile

(high speed with no need for licence and better operation

in fog, compared to O = 1.55 Pm)

100 Gbps

40 Gbps

10 Gbps

1 Gbps

622 Mbps

155 Mbps

1 Mbps

Bandwidth

Local

Network

Last Mile

Metro Backbone Long-Haul Backbone

4 to 7 years

1 to 4 years

Present

R. Martini et al., IEE Elect. Lett. 37 (11), p. 1290, 2001.

S. Blaser et al., IEE Elect. Lett. 37 (12), p. 778, 2001.

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Detection techniques already demonstrated using QCL:

• photo-acoustic

– B. Paldus et al., Opt. Lett. 24 (3), p.178, 1999.

– D. Hofstetter et al., Opt. Lett. 26 (12), p. 887, 2001.

– M. Nägele et al., Analytical Sciences 17 (4), p. 497, 2001.

•TILDAS

• M. Zahniser et al. (Aerodyne Research), TDLS’03.

• cavity ringdown

– B. Paldus et al., Opt. Lett. 25 (9), p. 666, 2000.

• absorption spectroscopy

– A. Kosterev et al., Appl. Phys. B 75 (2-3), p. 351, 2002.

• heterodyne detection scheme

– D. Weidmann et al., Opt. Lett. 29 (9), p. 704, 2003.

• cavity enhanced spectroscopy

• D. Bear et al. (Los Gatos Research), TDLS’03.

Main application: chemical sensing by optical spectroscopy

Some needs:

high-power laser

single mode

continuous-wave

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Alpes Lasers . TC-3 Datasheet Page 10

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