Control of peaking of laser driver current to improve eye...

H - Electricity – 04 – B

Patent

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Details

H04B 10/08 (2006.01) H04B 10/155 (2006.01) H04B 10/24 (2006.01) H01S 5/042 (2006.01)

Patent

CA 2504622

An optical transceiver module (Fig. 3) having digital control of laser current peaking is disclosed. The optical transceiver module comprises a controller and integrated postamplifier/laser driver (Fig. 3), which are included on a printed circuit board disposed in the module. Transmitting (14) and receiving optical sub-assemblies (47) are also disposed in the module. A digital signal interface (50B) interconnects the controller with the integrated postamplifier/laser driver. Digital control signals produced by the controller are transmitted via the digital signal interface to the integrated post- amplifier/laser driver, where they are converted to analog control signals. The analog control signals are forwarded to control components (48) responsible for governing the electrical current supplied to the laser of the transmitting optical sub-assembly. The laser current is intermittently peaked by the control signal in order to hasten the transition from light to no-light emission, thereby improving laser response and performance.

L'invention concerne un module d'émetteur-récepteur optique comprenant une commande numérique de crêtes de courant laser. Le module d'émetteur-récepteur optique comprend un contrôleur et un post-amplificateur/circuit d'attaque de laser intégré qui sont inclus sur une carte de circuit imprimé disposée dans ledit module. Des sous-ensembles (47) d'émission (14) et de réception optiques sont également disposés dans ce module. Une interface (50B) de signaux numériques interconnecte le contrôleur et le post-amplificateur/circuit d'attaque de laser intégré. Des signaux de commande numériques produits par le contrôleur sont transmis via l'interface de signaux numériques au post-amplificateur/circuit d'attaque de laser intégré, où ils sont convertis en signaux de commande analogiques. Ces signaux de commande analogiques sont envoyés à des composants de commande (48) responsables de la régulation du courant électrique fourni au laser du sous-ensemble d'émission optique. Le signal de commande amène le courant laser à produire des crêtes de manière intermittente afin d'activer le passage de l'émission de lumière à la non émission de lumière, ce qui permet d'améliorer la réponse du laser et sa performance.

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