Optical transceiver
View Patent ↗An optical transceiver is configured to use, as an electric signal, a digital modulation signal having a predetermined bit rate. The optical transceiver includes a case having a space for storing a component therein and a resistor being arranged between upper and lower surfaces of the space and having conductance of from 1 S/m to 1,000 S/m. The space has a height equal to or less than a wavelength in a free space of an electromagnetic wave of a frequency corresponding to the predetermined bit rate. At least a part of the height of the space is larger than a half of the wavelength. The height of the space is smaller than a width of the space. The width of the space is smaller than a depth of the space.
1. An optical transceiver, which is configured to use, as an electric signal, a digital modulation signal having a predetermined bit rate, the optical transceiver comprising:
a case having a space for storing a component therein; and
a resistor being arranged between upper and lower surfaces of the space and having conductance of from 1 S/m to 1,000 S/m,
wherein the space has a height equal to or less than a wavelength in a free space of an electromagnetic wave of a frequency corresponding to the predetermined bit rate,
wherein at least a part of the height of the space is larger than a half of the wavelength,
wherein the height of the space is smaller than a width of the space, and
wherein the width of the space is smaller than a depth of the space.
2. The optical transceiver according to claim 1 , wherein at least a part of the resistor is positioned at a height-direction center of the space formed in the case.
3. The optical transceiver according to claim 1 , wherein:
the bit rate is equal to or less than 25.78 Gbit/s; and
the height of the space is less than 11.6 mm.
4. The optical transceiver according to claim 1 , wherein:
the bit rate is one of 25.78 Gbit/s and 27.95 Gbit/s;
at least a part of the height of the space is larger than 5.8 mm; and
the height of the space is less than 10.7 mm.
5. The optical transceiver according to claim 1 , wherein the resistor has an extending part in a width direction of the case.
6. The optical transceiver according to claim 1 , wherein a width of the resistor is set to a value of 86% or more and 100% or less of a width of the case.
7. The optical transceiver according to claim 1 , wherein the resistor comprises a nonmagnetic member.
8. The optical transceiver according to claim 1 , wherein the resistor is made of a material using one of graphite and carbon black as a filler in resin.
9. The optical transceiver according to claim 1 , wherein the resistor comprises a support member configured to support the component.
10. The optical transceiver according to claim 9 , wherein the component comprises at least one of an optical fiber or an optical element module.
11. The optical transceiver according to claim 9 , wherein:
the component comprises two printed circuit boards; and
a part of the resistor having an extending part in a width direction of the case is positioned between the two printed circuit boards.