Optical networking unit (ONU) packaging
AssigneeApplied Optoelectronics, Inc.
InventorsI-Lung Ho, Jun Zheng, Hung-Lun Chang
Life of this patent
Estimating the term…
Abstract
A bidirectional optical subassembly (BOSA) optical networking unit (ONU) generally includes a BOSA housing. A tunable laser is located in the BOSA housing and is configured to generate a first optical signal for transmission at a first selected wavelength based on temperature control. The tunable laser is a distributed feedback (DFB) laser diode. A thermal management device is also located in the BOSA housing and is configured to provide the temperature control. A photo diode is further located in the BOSA housing and is configured to receive a second optical signal at a second selected wavelength. The BOSA housing comprises an alloy of stainless steel or an alloy of Kovar.
Claims17
A bidirectional optical subassembly (BOSA) optical networking unit (ONU) comprising:
- a BOSA housing configured to be coupled to a single optical fiber for transmitting and receiving optical signals, said BOSA housing comprising a single metal housing and a removable cover over a portion of said single metal housing to provide access to an interior of the BOSA ONU, wherein said BOSA housing comprises an alloy of stainless steel or an alloy of Kovar to provide thermal conductivity for components in said ONU;
- a tunable laser located in said BOSA housing without a separate TOSA housing, said tunable laser configured to generate a first optical signal for transmission at a first selected wavelength based on temperature control;
- a thermal management device located in said BOSA housing, said thermal management device configured to provide said temperature control;
- a photo diode located in said BOSA housing, said photo diode configured to receive a second optical signal at a second selected wavelength;
- and
- a diplexer optically coupled to said tunable laser and to said photo diode, said diplexer being configured to optically couple said first optical signal from said tunable laser to said single optical fiber and to optically couple said second optical signal from said single optical fiber to said photo diode.
A method for fabricating a bidirectional optical subassembly (BOSA) optical networking unit (ONU), said method comprising:
- configuring a tunable laser to generate a first optical signal for transmission at a first selected wavelength based on temperature control;
- configuring a thermal management device to provide said temperature control;
- configuring a photo diode to receive a second optical signal at a second selected wavelength;
- enclosing said tunable laser, said thermal management device and said photo diode in a BOSA ONU housing without separately enclosing said tunable laser in a TOSA housing, said BOSA housing comprising a single metal housing and a removable cover over a portion of said single metal housing to provide access to an interior of the BOSA ONU, wherein said BOSA housing comprises an alloy of stainless steel or an alloy of Kovar to provide thermal conductivity for components in said ONU;
- and
- optically coupling a diplexer between both said tunable laser and said photo diode and a single optical fiber such that said diplexer is configured to optically couple said first optical signal from said tunable laser to said single optical fiber and to optically couple said second optical signal from said the single optical fiber to said photo diode.
Dependencies are inferred from the claim text.