US 11,949,453 B2
Test device and test method for DFB-LD for RoF system
Seung-Hyun Cho, Sejong-si (KR); and Joon Ki Lee, Sejong-si (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Jun. 22, 2022, as Appl. No. 17/846,604.
Claims priority of application No. 10-2021-0083289 (KR), filed on Jun. 25, 2021; and application No. 10-2021-0175822 (KR), filed on Dec. 9, 2021.
Prior Publication US 2022/0416891 A1, Dec. 29, 2022
Int. Cl. H04B 10/07 (2013.01); H04B 10/077 (2013.01); H04B 10/2575 (2013.01)
CPC H04B 10/2575 (2013.01) [H04B 10/077 (2013.01); H04B 10/07 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A test device for testing a distributed feedback laser diode (DFB-LD) device for an optical transceiver of a radio over fiber (RoF) system, comprising:
a current source for inputting a current into the DFB-LD to generate an optical output and a PD current output during testing;
a computer for applying maximum and minimum limiting ratings for a plurality of parameters to the DFB-LD device during testing, wherein the parameters are applied one at a time while all other parameters are kept in a normal performance range for a preset period of time and no fatal damage to the DFD-LD occurs during the preset period of time;
a case for subjecting the DFB-LD to a desired temperature during testing;
the computer for applying various functional specification parameters according to an operating condition for a function specification to the DFB-LD device during testing, and
a measuring device for measuring the optical output and the PD current output during testing.