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Conference Paper: Heat transfer and thermal lensing in large-mode high-power laser diodes

TitleHeat transfer and thermal lensing in large-mode high-power laser diodes
Authors
KeywordsCoupling Efficiency
Heat Transfer
Thermal Lensing
Thermoreflectance
Issue Date2007
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml
Citation
Proceedings Of Spie - The International Society For Optical Engineering, 2007, v. 6456 How to Cite?
AbstractIn semiconductor lasers, key parameters such as threshold current, efficiency, wavelength, and lifetime are closely related to temperature. These dependencies are especially important for high-power lasers, in which device heating is the main cause of decreased performance and failure. Heat sources such as non-radiative recombination in the active region typically cause the temperature to be highly peaked within the device, potentially leading to large refractive index variation with bias. Here we apply high-resolution charge-coupled device (CCD) thermoreflectance to generate two dimensional (2D) maps of the facet temperatures of a high power laser with 500 nm spatial resolution. The device under test is a slab-coupled optical waveguide laser (SCOWL) which has a large single mode and high power output. These characteristics favor direct butt-coupling the light generated from the laser diode into a single mode optical fiber. From the high spatial resolution temperature map, we can calculate the non-radiative recombination power and the optical mode size by thermal circuit and finite-element model (FEM) respectively. Due to the thermal lensing effect at high bias, the size of the optical mode will decrease and hence the coupling efficiency between the laser diode and the single mode fiber increases. At I=10Ith, we found that the optical mode size has 20% decrease and the coupling efficiency has 10% increase when comparing to I=2Ith. This suggests SCOWL is very suitable fr optical communication system.
Persistent Identifierhttp://hdl.handle.net/10722/158972
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorChan, PKLen_US
dc.contributor.authorPipe, KPen_US
dc.contributor.authorPlant, JJen_US
dc.contributor.authorSwint, RBen_US
dc.contributor.authorJuodawlkis, PWen_US
dc.date.accessioned2012-08-08T09:04:52Z-
dc.date.available2012-08-08T09:04:52Z-
dc.date.issued2007en_US
dc.identifier.citationProceedings Of Spie - The International Society For Optical Engineering, 2007, v. 6456en_US
dc.identifier.issn0277-786Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/158972-
dc.description.abstractIn semiconductor lasers, key parameters such as threshold current, efficiency, wavelength, and lifetime are closely related to temperature. These dependencies are especially important for high-power lasers, in which device heating is the main cause of decreased performance and failure. Heat sources such as non-radiative recombination in the active region typically cause the temperature to be highly peaked within the device, potentially leading to large refractive index variation with bias. Here we apply high-resolution charge-coupled device (CCD) thermoreflectance to generate two dimensional (2D) maps of the facet temperatures of a high power laser with 500 nm spatial resolution. The device under test is a slab-coupled optical waveguide laser (SCOWL) which has a large single mode and high power output. These characteristics favor direct butt-coupling the light generated from the laser diode into a single mode optical fiber. From the high spatial resolution temperature map, we can calculate the non-radiative recombination power and the optical mode size by thermal circuit and finite-element model (FEM) respectively. Due to the thermal lensing effect at high bias, the size of the optical mode will decrease and hence the coupling efficiency between the laser diode and the single mode fiber increases. At I=10Ith, we found that the optical mode size has 20% decrease and the coupling efficiency has 10% increase when comparing to I=2Ith. This suggests SCOWL is very suitable fr optical communication system.en_US
dc.languageengen_US
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xmlen_US
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_US
dc.subjectCoupling Efficiencyen_US
dc.subjectHeat Transferen_US
dc.subjectThermal Lensingen_US
dc.subjectThermoreflectanceen_US
dc.titleHeat transfer and thermal lensing in large-mode high-power laser diodesen_US
dc.typeConference_Paperen_US
dc.identifier.emailChan, PKL:pklc@hku.hken_US
dc.identifier.authorityChan, PKL=rp01532en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1117/12.700773en_US
dc.identifier.scopuseid_2-s2.0-34247402094en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34247402094&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume6456en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridChan, PKL=35742829700en_US
dc.identifier.scopusauthoridPipe, KP=6603768450en_US
dc.identifier.scopusauthoridPlant, JJ=7103190594en_US
dc.identifier.scopusauthoridSwint, RB=6603698023en_US
dc.identifier.scopusauthoridJuodawlkis, PW=6603752090en_US

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