Pager receiver circuit and laser: what they have in common

1. Step 1. Pager receiver circuit — is part of — Pager. It receives messages on a dedicated frequency.
2. Step 2. Pager — has part — Antenna. It receives the signal with an antenna.
3. Step 3. Antenna — is part of — Base station. Antennas.
4. Step 4. Base station — uses — Optical fibre. The link to the core network.
5. Step 5. Optical fibre — uses — Laser diode. The source is a laser.
6. Step 6. Laser diode — is a kind of — Laser. A semiconductor laser.

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