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<article  article-type="research-article"        dtd-version="1.4">
            <front>

                <journal-meta>
                                                                <journal-id>gujs part c</journal-id>
            <journal-title-group>
                                                                                    <journal-title>Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji</journal-title>
            </journal-title-group>
                                        <issn pub-type="epub">2147-9526</issn>
                                                                                            <publisher>
                    <publisher-name>Gazi University</publisher-name>
                </publisher>
                    </journal-meta>
                <article-meta>
                                        <article-id pub-id-type="doi">10.29109/gujsc.1596714</article-id>
                                                                <article-categories>
                                            <subj-group  xml:lang="en">
                                                            <subject>Photonic and Electro-Optical Devices, Sensors and Systems (Excl. Communications)</subject>
                                                    </subj-group>
                                            <subj-group  xml:lang="tr">
                                                            <subject>Fotonik ve Elektro-Optik Cihazlar, Sensörler ve Sistemler (İletişim Hariç)</subject>
                                                    </subj-group>
                                    </article-categories>
                                                                                                                                                        <title-group>
                                                                                                                        <article-title>COMPARISON OF ASE SPECTRUMS OF SINGLE PASS AND DOUBLE PASS Er, Yb, Er-Yb DOPED FIBER AMPLIFIERS</article-title>
                                                                                                                                                                                                <trans-title-group xml:lang="tr">
                                    <trans-title>TEK GEÇİŞLİ VE ÇİFT GEÇİŞLİ Er, Yb, Er-Yb KATKILI FİBER AMPLİFİKATÖRLERİN ASE SPEKTRUMLARININ KARŞILAŞTIRILMASI</trans-title>
                                </trans-title-group>
                                                                                                    </title-group>
            
                                                    <contrib-group content-type="authors">
                                                                        <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0002-0349-4013</contrib-id>
                                                                <name>
                                    <surname>Yücel</surname>
                                    <given-names>Murat</given-names>
                                </name>
                                                                    <aff>Gazı University</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0009-0002-3558-4870</contrib-id>
                                                                <name>
                                    <surname>Pishgam</surname>
                                    <given-names>Pouria</given-names>
                                </name>
                                                                    <aff>GAZİ ÜNİVERSİTESİ, FEN BİLİMLERİ ENSTİTÜSÜ</aff>
                                                            </contrib>
                                                                                </contrib-group>
                        
                                        <pub-date pub-type="pub" iso-8601-date="20250324">
                    <day>03</day>
                    <month>24</month>
                    <year>2025</year>
                </pub-date>
                                        <volume>13</volume>
                                        <issue>1</issue>
                                        <fpage>1</fpage>
                                        <lpage>9</lpage>
                        
                        <history>
                                    <date date-type="received" iso-8601-date="20241205">
                        <day>12</day>
                        <month>05</month>
                        <year>2024</year>
                    </date>
                                                    <date date-type="accepted" iso-8601-date="20241221">
                        <day>12</day>
                        <month>21</month>
                        <year>2024</year>
                    </date>
                            </history>
                                        <permissions>
                    <copyright-statement>Copyright © 2013, Gazi University Journal of Science Part C: Design and Technology</copyright-statement>
                    <copyright-year>2013</copyright-year>
                    <copyright-holder>Gazi University Journal of Science Part C: Design and Technology</copyright-holder>
                </permissions>
            
                                                                                                <abstract><p>In this study, the amplified spontaneous emission (ASE) spectra of Erbium (EDFA), Ytterbium (YDFA), and Erbium-Ytterbium (EYDFA) doped optical amplifiers were obtained in single-pass and double-pass simulation setups, compared and interpreted with each other. The  and  spectra of the single-pass and double-pass setups of EDFA, YDFA, and EYDFA were compared using the ASE equations obtained at the Erbium energy level. The values applied in the single-pass and double-pass simulations, pump wavelength, pump power, amplifier length, and amplifier parameters, were assumed equally in both models. The pump wavelength for EDFA was 1480 nm, and the pump power was 1400 mW; the pump wavelength for YDFA was 960 nm, and the pump power was 800 mW, and these values were applied as 1025 nm and 1600 mW for EYDFA, respectively. The graphs at the output of the dual port spectrum analyzer showed that higher ASE values were obtained in the double-pass environment compared to the single-pass environment.</p></abstract>
                                                                                                                                    <trans-abstract xml:lang="tr">
                            <p>Bu çalışmada, Erbiyum (EDFA), İterbiyum (YDFA) ve Erbiyum-İterbiyum (EYDFA) katkılı optik yükselteçlerin yükseltilmiş kendiliğinden emisyon (ASE) spektrumları tek geçişli ve çift geçişli simülasyon düzeneklerinde elde edilmiş, karşılaştırılmış ve yorumlanmıştır. EDFA, YDFA ve EYDFA&#039;nın tek geçişli ve çift geçişli düzeneklerinin spektrumları Erbiyum enerji seviyesinde elde edilen ASE denklemleri kullanılarak karşılaştırılmıştır. Tek geçişli ve çift geçişli simülasyonlarda uygulanan değerler, pompa dalga boyu, pompa gücü, yükselteç uzunluğu ve yükselteç parametreleri her iki modelde de eşit olarak varsayılmıştır. EDFA için pompa dalga boyu 1480 nm ve pompa gücü 1400 mW; YDFA için pompa dalga boyu 960 nm ve pompa gücü 800 mW olup bu değerler EYDFA için sırasıyla 1025 nm ve 1600 mW olarak uygulanmıştır. Çift portlu spektrum analizörünün çıkışındaki grafikler, tek geçişli ortama kıyasla çift geçişli ortamda daha yüksek ASE değerlerinin elde edildiğini göstermiştir.</p></trans-abstract>
                                                            
            
                                                            <kwd-group>
                                                    <kwd>Amplified spontaneous spectrum</kwd>
                                                    <kwd>  EDFA</kwd>
                                                    <kwd>  YDFA</kwd>
                                                    <kwd>  EYDFA</kwd>
                                                    <kwd>  single-pass</kwd>
                                                    <kwd>  double-pass.</kwd>
                                            </kwd-group>
                                                        
                                                                            <kwd-group xml:lang="tr">
                                                    <kwd>kendiliğinden yükseltilmiş yayılma</kwd>
                                                    <kwd>  EDFA</kwd>
                                                    <kwd>  YDFA</kwd>
                                                    <kwd>  EYDFA</kwd>
                                                    <kwd>  tek geçiş</kwd>
                                                    <kwd>  çift geçiş</kwd>
                                            </kwd-group>
                                                                                                            </article-meta>
    </front>
    <back>
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